Question

what is a fossil?
the remains of an animal or plant preserved within a layer of rock
a large body of compacted ice formed over thousands of years
the energy radiated from the sun
a change in the structure of earths surface

Explanation:

A fossil is the preserved remains or traces of animals, plants, and other organisms from the remote past, often found within rock layers. The other options describe ice (glacier), solar energy, and geological change respectively.

Answer:

the remains of an animal or plant preserved within a layer of rock