longer seasons. accelerated erosion. reduced photosynthesis. increased number of hurricanes.
I gave my students this multiple choice question: Some scientists believe that the mass extinction of dinosaurs was caused by the impact of a large meteorite on Earth. This impact would have caused a darkening of the sky due to dust blown into the upper atmosphere. This darkening would have reduced the sizes of some ecosystems because of

Only one answer is correct among these 4 choices:
- longer seasons.
- accelerated erosion.
- reduced photosynthesis.
- increased number of hurricanes.

Could you tell me which one is correct?

reduced photosynthesis.