1,000,000 years 100,000 years 10,000 years 1,000 years
I gave my students this multiple choice question: Swamp plants die, fall to the ground, and are buried by other dying plants. Approximately how long would it take for plants to possibly become a fossil fuel?

Only one answer is correct among these 4 choices:
- 1,000,000 years
- 100,000 years
- 10,000 years
- 1,000 years

Could you tell me which one is correct?

1,000,000 years