What is the main difference between the gas water vapor and the liquid water?

Question

A.
The molecules of water vapor pull on each other much more strongly than the molecules of liquid water do.
B.
Liquid water has much less space in between its molecules than water vapor does.
C.
The molecules of water vapor are much smaller than those of liquid water.
D.
Liquid water is made out of different molecules than water vapor is.

Answer 1

The main difference between gas water vapor and liquid water is:

B. Liquid water has much less space in between its molecules than water vapor does.

In the liquid state, water molecules are much closer together, resulting in stronger intermolecular forces compared to the gas state, where the molecules are far apart and have much weaker interactions.