Three years ago, nasim ate a burger and was violently sick a few hours afterwards. even though it was the only time up to that point that he had had this reaction to burgers, he cannot even look at a burger without feeling sick. why is his conditioned taste aversion puzzling from the perspective of the general principles of classical conditioning?

The association that Nasim made between eating the burger and feeling sick required only a single US-CS pairing.

Explanation:

The theory of classical conditioning was produced by Russian psychologist Ivan Pavlov to explain different aspects of human psychology. He explained how an unconditioned stimulus when paired with conditioned stimulus produce conditioned response. According to the question, question sickness due to burger was an unconditioned stimulus which is paired by Nasim to the burger (conditioned stimulus) and his feeling of sickness every time he saw a burger is conditioned response.

industry had made the u.s. the richest nation in the world at this time. the second industrial revolution caused growth in industry and transportation, which allowed increased trade between nations.