Final answer:
The US is the family, the CS is lasagna, the UR is happiness, and the CR is eating lasagna.
Step-by-step explanation:
The correct answer is option B) US: Family; CS: Lasagna; UR: Happiness; CR: Eating lasagna.
In classical conditioning, the unconditioned stimulus (US) is the stimulus that naturally and automatically triggers a response. In this case, the US is the family, as it naturally evokes happiness in the student. The conditioned stimulus (CS) is the neutral stimulus that is paired with the US to elicit the desired response. In this case, the CS is lasagna, as it is associated with the family and therefore triggers happiness. The unconditioned response (UR) is the automatic response to the US, which is happiness in this case. The conditioned response (CR) is the acquired response to the CS, which is eating lasagna in order to experience happiness.