Children often learn to associate pushing a vending machine button with the delivery of a candy bar. This best illustrates the process underlying

Operant conditioning

Explanation:

Operant conditioning: The term operant conditioning is also known to as instrumental conditioning and is given by B. F. Skinner.

This is one of the methods of learning that involves punishments and rewards for a specific behavior. This method of learning leads to create an association or connection between a particular and the consequence related to that behavior. It includes positive or negative punishment and reinforcement.

In the question above, the given statement illustrates the process of operant conditioning.