The warm air radiates and becomes cool again. The warm air evaporates into the cooler air. The warm air expands and rises, resulting in convection. The warm air loses its ability to hold water and precipitates.
I gave my students this multiple choice question: When air near the ground is warmed by sunlight, which of the following occurs?

Only one answer is correct among these 4 choices:
- The warm air radiates and becomes cool again.
- The warm air evaporates into the cooler air.
- The warm air expands and rises, resulting in convection.
- The warm air loses its ability to hold water and precipitates.

Could you tell me which one is correct?

The warm air expands and rises, resulting in convection.