What should be changed to make the following sentence true? In operant conditioning, organisms learn to associate events that repeatedly happen together.

The word "operant" should be changed to the word "classical."

Explanation:

While the operant conditioning was developed by B.F Skinner in which learning is fostered through reinforcement which could be in a form of reward or punishment. On the other hand, classical conditioning refers to a process of learning developed by Russian physiologist Ivan Pavlov that takes place by associations between an external stimulus and a naturally occurring stimulus.