Fact 1: Fossil fuels are formed from dead organisms over time. Fact 2: And that energy is generated by burning fossil fuel. Given the two facts above, dead organisms can create energy after what?

Pick from: [i] burning. [ii] winter. [iii] mutations. [iv] Cooking. [v] cycles. [vi] summer. [vii] freezing. [viii] Gunshots.
Answer:
[i]