in shallow areas over short periods of time. from the remains of organisms. in underground reservoirs that are relatively cool. by high winds and temperatures.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Fossil fuels are formed
Possibilities:
- in shallow areas over short periods of time.
- from the remains of organisms.
- in underground reservoirs that are relatively cool.
- by high winds and temperatures.

from the remains of organisms.