increasing the amount of solar radiation reaching Earth. storing energy produced by human activity. absorbing infrared radiation released by Earth. increasing the average density of air.
I gave my students this multiple choice question: Atmospheric greenhouse gases help heat the atmosphere by

Only one answer is correct among these 4 choices:
- increasing the amount of solar radiation reaching Earth.
- storing energy produced by human activity.
- absorbing infrared radiation released by Earth.
- increasing the average density of air.

Could you tell me which one is correct?

absorbing infrared radiation released by Earth.