The kinetic-molecular theory predicts that pressure rises as the temperature of a gas increases because

The kinetic-molecular theory predicts that rise in pressure is directly proportional to the rise in temperature of a gas because when temperature rises; the gas molecules will collide more frequently with the wall and at the same time, collide more energetically with the wall.

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.