how hurricanes formed long ago how the solar system was formed the cause of strong earthquakes how Earth's environments have changed
I gave my students this multiple choice question: What can we learn by studying fossils?

Only one answer is correct among these 4 choices:
- how hurricanes formed long ago
- how the solar system was formed
- the cause of strong earthquakes
- how Earth's environments have changed

Could you tell me which one is correct?

how Earth's environments have changed