Learning is the acquisition and development of knowledge and behaviors through experience or education. It results in relatively permanent changes in behavior. Classical conditioning is a form of learning where a previously neutral stimulus is repeatedly paired with an unconditioned stimulus that naturally elicits a reflexive response, resulting in the neutral stimulus also producing the response. The process involves an unconditioned stimulus that triggers an unconditioned response, and through repeated pairing, a previously neutral stimulus becomes the conditioned stimulus that elicits the conditioned response.