when kiara plays the piano, how does kinetic energy transfer from one object to the other?

When Kiara plays the piano, kinetic energy primarily transfers from her fingers to the piano keys. As she strikes the keys, the motion of her fingers (kinetic energy) causes the keys to move down and activate the mechanism that produces sound. Thus, the correct statement is:

**Energy transfers from Kiara's fingers to the piano keys.**

This kinetic energy transfer is what ultimately creates the sound that you hear when she plays.