Which of the following, the best explanation for the fact that most gases are easily compressed is that the molecules in a gas are in constant motion a. are relatively far apart b. have relatively small masses c. have a real, nonzero volume d. move slower as temperature decreases

A. are relatively far apart

Explanation:

Compressbility is the ability of compound to reduce in size when pressure is applied.

Gaseous state is a state in which the particles are loosely arranged and have a lot of space between them. Thus molecules can be easily compressed.

They have highest kinetic energy. This state has indefinite volume as well as shape.  The molecules in the gaseous state move faster with an increase in temperature as the kinetic energy increases with increase in temperature.

Thus most gases are easily compressed is that the molecules in a gas are in constant motion are relatively far apart.