Question

The revolution of the earth around the sun is an example of ________ motion.

Answer 1

1. Periodic motion: Any motion which repeats itself after a fixed interval of time is called periodic motion.
2. For example, the motion of the hands of a clock, the rotation of the earth around its axis, and the revolution of the earth around the sun.

Hence the right answer is: The revolution of the earth around the sun is an example of periodic motion.