after a drought after a heat wave after a forest fire after a tornado
I gave my students this multiple choice question: A serotinous cone is a seed enclosure that requires intense heat to open. When would a population of trees most benefit from having serotinous cones?

Only one answer is correct among these 4 choices:
- after a drought
- after a heat wave
- after a forest fire
- after a tornado

Could you tell me which one is correct?

after a forest fire