Sedimentary rocks are not very old. Organisms live only in areas with sedimentary rock. Organisms can be preserved in sedimentary rock. Sedimentary rocks are found only at the surface of the ground.
I gave my students this multiple choice question: Why are most fossils found in sedimentary rocks?

Only one answer is correct among these 4 choices:
- Sedimentary rocks are not very old.
- Organisms live only in areas with sedimentary rock.
- Organisms can be preserved in sedimentary rock.
- Sedimentary rocks are found only at the surface of the ground.

Could you tell me which one is correct?

Organisms can be preserved in sedimentary rock.