Fossils can depict

changes.

extinction.

both a and b

none of the above

both a and b

Explanation:

Fossils are the remains of the dead plants and animals preserved in the primitive rocks. These fossils depictes the evolutionary changes that have appeared from the primitive species to the species that exists today.These fossils depict the extinction of primitive species due to catastrophic events that could have occurred in past.

meteorologists would compare a new weather map with one 24 h old to see how fast a front is moving.

the answer is trees if i'm not mistaken