Answer:
The beginning of a paragraph.
Explanation:
You use your topic sentence to introduce the topics you will be talking about, while the rest of the sentences in the paragraph help support what you've stated in the topic sentence or add onto what you said.
17 7/8÷3 2/5
143/8÷17/5
multiply by reciprocal
143/8×5/17= 715/136= 5.26 which is closer to
<span>B. 6</span>
The subject in this sentence is 'Charles Darwin' which goes before the main verb 'studied'