Choices:
[A]. water vapor.
[B]. oxygen.
[C]. Heat energy.
[D]. heating liquids.
[E]. evaporation.
[F]. carbon dioxide.
[G]. air.
[H]. boiling.
Q: Fact 1: Water vapor cooling causes that water vapor to condense. Fact 2: Clouds form by the condensation of water vapor. Given the two facts above, what are clouds formed from?
A:
[A].