changing environments. volcanic activity. changing rates of erosion. evaporation of sea water.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Two layers of sedimentary rock are exposed on the side of a hill. Only one of the layers has fossils. The lack of fossils in one layer of sedimentary rock is most likely due to
Possibilities:
- changing environments.
- volcanic activity.
- changing rates of erosion.
- evaporation of sea water.

changing environments.