The correct answer would be option B, Unconditioned Stimulus. Pavlov placed meat powder in the mouths of dogs, and they began to salivation. The food acted as an unconditioned stimulus.
Explanation:
An unconditioned stimulus is a stimulus or which naturally, unconditionally or automatically triggers a response. Due to unconditioned stimulus, a response itself is generated automatically. For example, when you feel the smell of your favorite food and at once you feel hungry. In this example, smell is the unconditioned stimulus and hunger is the response.
Similarly, when Pavlov, the renowned psychologist, when conducted the research to see the relationships between stimulus and response, he found out that when he placed meat powder in the mouths of dog, they started to salivate. In this example, the meat powder acted as the unconditioned stimulus and salivation acted as the response to this stimulus.
Learn more about stimulus response at:
https://brainly.com/question/937756
#LearnWithBrainly
