Final answer:
The correct unconditioned response among the options provided is shaking in cold weather, as it is an automatic and natural reaction to the unconditioned stimulus of being in a cold environment, requiring no prior learning.
Step-by-step explanation:
Understanding Unconditioned Responses:
An unconditioned response (UCR) is a natural (unlearned) behavior that occurs as a reaction to an unconditioned stimulus (UCS). This type of response does not require any prior learning or conditioning to take place. When it comes to the options provided, shaking in cold weather is an example of a reflexive, unconditioned response. It is an automatic, natural reaction to the stimulus of being in a cold environment, and it does not require any learning process to occur.
In comparison to the other options given, playing marbles, running through a maze to get a food reward, and clapping after an exciting concert performance are all behaviors that are either learned or performed based on a condition. For instance, clapping after a concert is a learned social behavior while running through a maze to get food involves operant conditioning, where a behavior is reinforced by a reward.
Thus, the correct answer is Option 3: Shaking in cold weather, as it is a direct, unlearned response to the unconditioned stimulus of the cold temperature.