Rodney suffers severe food poisoning after eating lunch at his school cafeteria. As a result of the experience, every time Rodney walks past the cafeteria and smells the food, he feels nauseated. In the context of classical conditioning, the unconditioned stimulus is the

Bad food

Explanation:

food poisoning is a commonly occurring condition among people. It is an infectious disease. Million of the people affected because of food poisoning.  

Symptoms that most of the peoples complained:

People who suffer from this have taken medical services. Because of it, dehydration will occur. Even symptoms do not get resolved in a few days.  

Rodney suffers from severe food poisoning and he experienced every time. It occurs because Rodney nauseated with the smell of food. So in the context of classical conditioning, the unconditioned stimulus is the bad food.  

answer; the population in brazil is very diverse there are many races and ethnic groups