Answer:A.the kinetic molecular theory relates the properties of a state of matter to the motion of its molecules
When refering to the kinetic molecular theory, it refers to the belief that all things in the Universe are made of smaller particles called molecules, which are made of smaller parts called atoms. When we look at a solid, the particles are packed closely together, which is why the solid holds a shape. The same goes for gas, the particles are spaced out from one another, which is why the don't take a shape. While a liquid takes the shape of the container it is in, because the particles are far, but not far enough to seperate a gas until being boiled. I added a picture to better show the relation.
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