Lily does not like conflict. when her parents argue and raise their voices, lily feels frightened. she has seen her dad strike her mom after yelling at her. at school, mr. nash raises his voice and lily begins to tremble.
lily's trembling is

Conditioned response

Explanation:

Classical conditioned was proposed by Ivan Pavlov. In classical conditioning, the learned response is called the conditioned response.  

For instance:

The smell of the food = the US

Hunger in response to smell is = UCR

Whistle when smell the food is = CS

Again feel hunger when listen whistle is = CR

Thus here in the above statement, all process shows the classical conditioning in which Mr. Nash raises his voice and Lily starts trembling is an example of CR.

answer; presidential election years;