Give an example of an unconditioned response.

An unconditioned response is an automatic, natural reaction to an unconditioned stimulus that occurs without any prior learning or conditioning. A classic example of an unconditioned response is salivation in response to the presence of food in the mouth. This reflexive action is not learned; it is an innate response that occurs due to the biological wiring of an organism. When food enters the mouth, the salivary glands are activated naturally to help with the digestion process, and this salivation occurs without the need for the organism to have been previously taught or conditioned to respond in this way.