During a Zoology practical, an earthworm grips soil during crawling using tiny bristles projecting from its body wall. Select the most accurate identification.

Correct Answer: B

setae

Setae are chitinous bristles found in many annelids. They anchor the body during locomotion, especially in earthworms. This MCQ belongs to the Annelida topic in Animal Diversity-I and is written to test concept understanding rather than memorized wording.