What does classical conditioning rely upon?

Question

Quizplus · Accepted Answer

Classical conditioning relies upon the existence of stimulus-response relations, in which a neutral stimulus becomes able to elicit a specific response after being paired with a stimulus that naturally elicits that response. The other answer choices are not accurate as classical conditioning does not necessarily rely on learned responses to a stimulus or conscious responses, but rather on the formation of associations between stimuli and responses. Classical conditioning also does not rely on the existence of a central nervous system or complex motor responses.

What Does Classical Conditioning Rely Upon