B. Ocetoclast is the answer.
Consumers because scavengers hunt for food b
There's a group on each side so there's equal pull on both sides so it doesn't move
Certain fossils, called index fossils, help geologists match rock layers. To be useful as an index fossil, a fossil must be widely distributed and represent a type of organism that existed for a brief time period. Index fossils are useful because they tell the relative ages of the rock layers in which they occur.
