What is the similarities between a dog, cat, and bear?

The domestic dog is a member of genus Canis that forms part of the wolf-like canids, and is the most widely abundant carnivore

The domestic cat is a small, typically furry, carnivorous mammal.

Bears are carnivoran mammals of the family Ursidae. Bears are classified as caniforms, or doglike carnivorans. 

Here, this is the answer, B is a wave-cut cliff. It forms when waves erode the base of the land along a coast so much that the rock above collapses.