Which statement is true regarding the motion of gas particles?

Gas particles are in constant random motion, and this motion is characterized by having negligible interactions with one another, which is a fundamental assumption of the kinetic molecular theory. This means that, while gas particles do collide with each other and with the walls of their container, these interactions do not significantly affect their behavior under normal conditions. The assumption of negligible interactions allows us to treat gas dynamics more simply without having to account for forces between particles that would complicate their collective motion.

The random motion of gas particles also means that they do not follow a fixed pattern, so the first option does not correctly describe their behavior. Although gas particles do collide with each other and the walls of their container, stating that they only collide with each other or with the walls ignores the complexity of their interactions, making the other choices incorrect as well. Therefore, recognizing that gas particles have negligible interactions with one another underlines the understanding of their motion as being largely independent until they collide.