Answer:
In formal writing, the topic sentence is usually the first sentence in a paragraph (although it doesn't have to be).
A topic sentence is the most important sentence in a paragraph. Sometimes referred to as a focus sentence, the topic sentence helps organize the paragraph by summarizing the information in the paragraph.
- The topic part names the topic; it tells what the paragraph is about.
- The controlling idea part tells what the paragraph will say about the topic. Usually, the topic comes first and the controlling idea comes second in the topic sentence.
