An earthworm body is divided into repeated ring-like units along its length. The best answer is:

Correct Answer: C

metamerism

Metamerism is segmentation of the body into repeated units called metameres. It is a major feature of annelids and supports efficient movement and organ specialization. This MCQ belongs to the Annelida topic in Animal Diversity-I and is written to test concept understanding rather than memorized wording.