Explanation:
The answer is F...because h2o molecules are heavier than the atmosphere it surrounds. Therefore, gravity takes over. plse correct me if wrong.
because of gravity, h2o is directed down. That's how plants survive, Remember, ..what goes up, must go down...per " isaac newton."
There was no life on Earth for the first billion years because the atmosphere was not suitable for life. Earth's first atmosphere had lots of water vapor but had almost no oxygen. Later, frequent volcanic eruptions put several different gases into the air.
