If a body moves in a uniform circular motion, which of the following changes?

Circular motion is the movement of an object around the circumference of a circle or the rotation of an object along a circular path.

The force acts continuously at right angles to the particle's velocity.

Uniform circular motion is defined as circular motion in which the particle's speed remains constant. Force provides centripetal acceleration in a uniform circular motion.

Every moment, the direction of centripetal acceleration changes. As a result, the acceleration will change.

Similarly, the velocity changes as the direction of the velocity changes.

The magnitude of the velocity in a uniform circular motion is always the same, but the direction always changes. 

Because the magnitude of velocity is the same, kinetic energy and speed will always be the same in a uniform circular motion.