What is the diffrence between contact force and non contact force

The force which acts on an object without coming physically in contact with it is called non-contract force. The most familiar example of a non-contract force is weight. In contrast, a contact force is a force applied to a body by another body that is in contact with it.

Most likely a is the answer - because  you generate   38 atp's but also consume an atp.   each atp gives approx. less than 4 kcal so probably a is the closest answer.

So3 that’s what i think