Emily's feelings of terror at being stuck in an elevator when she was 5 can be explained by classical conditioning.
Classical conditioning can make a person react in a certain way to stimuli as a result of those stimuli having had an effect of them in the past.
Emily is reacting to being stuck in elevators with fear because she had been stuck in an elevator before.
This is therefore classical conditioning.
Find out more on classical conditioning at https://brainly.com/question/17583598.