What features of the boulder make it hard to move?

Boulder or large rocks have a greater mass and volume. In this case, boulders are quite difficult to move than smaller rocks.

Explanation:

most likely to see nocturnal animals

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above