Answer:
[tex] \large \boxed { \bf classical \ conditioning} [/tex]
Explanation:
It is a certain kind of learning in which a neutral stimulus becomes linked with an unambiguous one resulting in a response similar to that brought about by the unambiguous stimulus. In this case, the white uniform does not elicit any change in the behavior of the child. Nevertheless, when combined with a meaningful event like the pain from the shot, the white uniform becomes a conditioned stimulus and this leads to fear and crying in children as it is now a conditioned response. It shows how organisms such as human beings can associate unrelated stimuli with important events that happen around them affecting their actions and feelings.