Question

read the paragraph. then, add the best topic sentence. wrinkles on wet skin could have helped early humans collect food from wet places, like streams. wrinkles on wet fingers could have helped them hold on to slippery objects better. and wrinkles on toes could have helped our ancestors bare feet grip smooth, wet surfaces, similar to how tire ridges help tires grip slippery roads. animals, plants, and humans all adapt to their environments in many different ways. wrinkles that appear on our wet fingers make it easier for us to pick things up. the wrinkles that appear on our wet fingers and toes may have been useful to our ancestors.

Explanation:

The paragraph focuses on the usefulness of wrinkles on wet fingers, toes and skin for early humans. The first option is too general as it includes animals and plants. The second option only mentions fingers. The third option encompasses fingers and toes and the ancestral - use aspect which matches the content of the paragraph.

Answer:

The wrinkles that appear on our wet fingers and toes may have been useful to our ancestors.