Q: You are presented with the quiz "Water vapor doing what causes clouds or rain?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "water vapor cooling causes that water vapor to condense" and "cooler air can hold less water vapor than warmer air and condenses as clouds or in the form of rain". So, what's the best answer to the question?

Select from the following. A). flooding B). decreasing C). dissolving D). moves E). warming F). boiling G). heat H). cooling
A:
H).