Answer the following question given this paragraph: 

Sponges are a source of food for many species of fish. Because sponges are anchored to a reef or rock, they can’t run away from predators. However, their sharp spicules provide some defense. They also produce toxins that may poison predators that try to eat them.


Q: Where are sponges most likely anchored to?

 Choices:

- sea floor

- sand

- beaches

- reef or rock

A:
reef or rock
