Q: What is the major source of warmth for earth?


Read this paragraph and choose the correct option from the provided answers:

Earth is warmed by energy that radiates from the sun. Earth radiates some of the energy back into space. Greenhouse gases (GHGs) trap much of the re-radiated energy, causing an increase in the temperature of the atmosphere close to the surface.

 Choices:

- the Moon

- seasons

- equator

- the sun


A:
the sun