Answer:
Classical conditioning:
When a neutral stimulus is paired with the stimulus that naturally produces the response of the stimulus. The classical conditioning was proposed by Ivan Pavlov.
Opera-nt conditioning:
The consequences of the behavior which determine whether it is repeated or not. It is depended on the behavior of animals. The opera-nt conditioning was proposed by B.F Skinner.
Observational learning:
Observational learning is when learning occurs due to watching or modeling or the action of others.