Final answer:
The example of kinetic energy being converted into gravitational potential energy is a person walking up a hill, as their upward movement does work against gravity.
Step-by-step explanation:
The conversion of kinetic energy into gravitational potential energy is best represented by a person walking up a hill. As a person ascends the hill, they are doing work against the pull of gravity.
This work is then stored as gravitational potential energy.
The person's legs convert chemical energy from their body into kinetic energy as they move, and as they gain height, that kinetic energy is converted into gravitational potential energy.
This process continues until the person stops moving upward.