5.1 The Paragraph as a Unit of Thought
A paragraph is not a visual break; it is a promise — one controlling idea, developed. A well-built paragraph has three properties: unity (everything relates to one idea), coherence (sentences connect in a readable order), and adequate development (the idea is supported, not merely announced).
5.2 The Topic Sentence
The topic sentence states the paragraph's controlling idea. It usually opens the paragraph, giving readers a frame before details arrive; occasionally it closes a paragraph that builds to a conclusion (inductive order).
| Quality | Weak Topic Sentence | Strong Topic Sentence |
|---|---|---|
| Makes an arguable point, not a fact | "The internet was invented in the 20th century." | "The internet has quietly rewritten the rules of student research." |
| Sets a limited scope | "Pollution is a problem." | "Vehicular pollution in Delhi peaks in winter for three measurable reasons." |
| Forecasts the development | "Exercise is good." | "Twenty minutes of daily exercise improves memory, mood, and sleep." |
5.3 Unity: One Idea, No Stowaways
Every sentence must serve the topic sentence. Find the intruder:
"Hostel life teaches self-reliance. Students learn to manage money, laundry, and deadlines without parental reminders. The mess food is often criticised in student surveys. Most importantly, they learn to resolve conflicts with roommates on their own."
The mess-food sentence breaks unity — interesting, but it serves a different idea. Exam tip: "identify the irrelevant sentence" questions are testing unity.
5.4 Coherence Devices
Coherence is engineered with five tools:
- Repetition of key nouns: repeating "the policy" instead of drifting among vague synonyms.
- Pronouns: "The new policy... It requires..." (ensure the antecedent is unmistakable).
- Consistent point of view and tense: do not lurch from "students" to "you" to "one".
- Parallel structure: parallel sentences signal parallel ideas.
- The known–new chain: open each sentence with given information, end with new (Lesson 1).
5.5 The Transitions Toolbox
Transitions are signposts that tell the reader what relationship the next sentence has to the last.
| Function | Transitions |
|---|---|
| Addition | moreover, furthermore, in addition, besides |
| Contrast | however, nevertheless, on the other hand, whereas, yet |
| Cause / effect | therefore, consequently, as a result, hence, thus |
| Sequence | first, next, subsequently, finally, meanwhile |
| Example | for instance, for example, to illustrate, namely |
| Concession | admittedly, granted, of course, it is true that |
| Conclusion | in conclusion, in short, on the whole, ultimately |
Warning: transitions cannot rescue disordered ideas. If the logic is broken, a "therefore" only decorates the break. Order first, signpost second.
5.6 The PEEL Structure
PEEL is a reliable skeleton for body paragraphs in essays and answers:
| Letter | Element | Job |
|---|---|---|
| P | Point | Topic sentence stating the claim |
| E | Evidence | Fact, example, statistic, or authority supporting it |
| E | Explanation | Why the evidence proves the point — the reasoning step students skip |
| L | Link | Ties back to the essay's thesis or forward to the next paragraph |
Annotated Sample Paragraph
"[P] Remote internships broaden opportunity for students outside metro cities. [E] A tier-3 college student can now intern with a Bengaluru start-up without paying that city's rents; placement cells report a visible rise in such remote offers since 2021. [E1] The barrier that once filtered talent was geography and money, not ability — remove the commute and the rent, and the applicant pool widens on merit. [L] This widening of access, however, brings a new challenge of self-discipline, which the next paragraph examines."
Note how the Explanation sentence does the intellectual work: it converts an observation into an argument.
5.7 Paragraph Length and Paragraphing Decisions
There is no fixed sentence count; a paragraph ends when its idea is developed. Practical norms: 3–8 sentences in academic prose; one-sentence paragraphs only for deliberate emphasis; start a new paragraph on a change of idea, time, place, speaker, or step in the argument. In emails and web writing, shorter paragraphs (1–3 sentences) respect screen reading.
🎯 Exam Focus
- Define unity, coherence, and adequate development in a paragraph.
- What is a topic sentence? Convert this into a strong one: "Mobile phones are common."
- Explain the PEEL structure and write one PEEL paragraph on "Attendance policies in colleges."
- List transition words for contrast, cause-effect, and concession (two each), and use any three in sentences.
- "Transitions cannot rescue disordered ideas." Comment.
- Given a five-sentence paragraph in the exam, how would you identify the sentence that violates unity? Describe your test.