Answer:
Associates events.
Explanation:
As described by Russian physiologist Ivan Pavlov, classical conditioning refers to a learning mechanism that takes place by a mixture of external stimuli and natural stimulation. First, an unconditioned stimulus creates an unconditioned reaction in the body. After that a stimulus that causes no response (i.e. neutral) is correlated with an unconditioned stimulus at which point it is also known as a conditioned stimulus. The conditioned stimulus then would combined with the unconditioned stimulus . to generate a new conditioned response.
