a cloud a rainbow a sunset a tornado
I gave my students this multiple choice question: When dense, cold air pushes beneath warmer atmospheric air, the lighter, warmer air rises. As this air rises into the atmosphere, it cools and some of the water vapor in it condenses. Which of the following will most likely form as this occurs?

Only one answer is correct among these 4 choices:
- a cloud
- a rainbow
- a sunset
- a tornado

Could you tell me which one is correct?

a cloud