Answer the following question given this paragraph: 

The hemisphere that is tilted away from the Sun is cooler because it receives less direct rays. As Earth orbits the Sun, the Northern Hemisphere goes from winter to spring, then summer and fall. The Southern Hemisphere does the opposite from summer to fall to winter to spring. When it is winter in the Northern hemisphere, it is summer in the Southern hemisphere, and vice versa.


Q: The hemisphere that is tilted away from the sun is cooler because it receives less what?

 Choices:

- direct electrons

- x-rays

- pollution

- direct rays

A:
direct rays
