Pavlov found that meat powder placed on a dog's tongue will make the dog salivate.What is the meat powder in Pavlov's terms

A)  unconditioned stimulus 
B)  conditioned stimulus 
C)  conditioned response 
D)  unconditioned response

Unconditioned Stimulus

In classical conditioning, a stimulus that naturally and automatically triggers a response without any prior learning.

Meat Powder

In the context of classical conditioning, a substance used by Ivan Pavlov in experiments that triggered salivation in dogs, serving as an unconditioned stimulus.

Salivate

The process of producing saliva in the mouth, often as a response to the sight, smell, or thought of food.