It becomes warmer and forms clouds. It becomes cooler and forms clouds. Its temperature remains the same. Its temperature varies greatly.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: What happens to a moist air mass as it moves upward in the atmosphere?
Possibilities:
- It becomes warmer and forms clouds.
- It becomes cooler and forms clouds.
- Its temperature remains the same.
- Its temperature varies greatly.

It becomes cooler and forms clouds.