Question

The idea that no energy is lost when gas molecules hit the walls of a container or each other is explained by which statement of the kinetic molecular theory?

Answer 1

is there a list of choices?

Answer 2

well assuming we have the same choices id go with The molecular collisions are perfectly elastic.

Answer 3

That is a statement of kinetic theory of an ideal gas.
It states that in an enclosed container, the collisions of molecules are perfectly elastic, that is, kinetic energy is constant.
This also goes with what @kitties_rules said.