Increasing the temperature of a given amount of gas at constant volume causes the pressure to increase because . there is less space where the molecules can move around there are more molecules the molecules are striking a larger area with less force the molecules are moving more quickly

the molecules are moving more quickly

Explanation:

The  relationship between temperature and pressure is explained using the kinetic theory of matter.

As the temperature of the gas is increased, the molecules have a greater kinetic energy. This increased energy of the gas molecules make the collision between the molecules and with the walls of the container more rapid.

The correct option is;

the molecules are moving more quickly

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation: