In evaluating unity, which statement best describes a well-constructed paragraph?

• A. Every sentence supports the main idea.
• B. Every sentence introduces a new idea.
• C. The paragraph should include many unrelated details.
• D. Transitions should be avoided.

Answer: (A)

Clear unity in a well-constructed paragraph means every sentence stays tied to the central idea and helps develop it. The statement that every sentence supports the main idea is the best because it keeps the paragraph focused: each sentence adds information, evidence, or detail that reinforces the point, and nothing should stray into a completely different topic. For example, if the paragraph argues that exercise improves mood, each sentence should contribute to that claim, such as describing mood changes, citing studies, or giving quick examples, while avoiding digressions into unrelated topics like what you had for breakfast. Introducing a new idea would shift the focus, and including many unrelated details would overwhelm the reader and undermine the central purpose. Transitions help maintain unity by showing how one sentence leads to the next, so they should be used rather than avoided, because smooth links keep the paragraph connected to the main idea.