Q: Parasitic leeches feed off of what?


Read this paragraph and choose the correct option from the provided answers:

Annelids are segmented worms such as earthworms and leeches. Annelids have a coelom, closed circulatory system, excretory system, and complete digestive system. They also have a brain. Earthworms are important deposit feeders that help form and enrich soil. Leeches are either predators or parasites. Parasitic leeches feed off the blood of vertebrate hosts.

 Choices:

- brain

- tissue

- tumor

- blood


A:
blood