You are home alone one evening when you hear some noises coming from the kitchen. Your heart rate increases and your mouth becomes dry. This is BEST explained by the activation of your system.

sympathetic nervous.

Explanation:

The sympathetic nervous system is part of the autonomous nervous system drives the rapid involuntary response of the body in hazardous or stressful situations. It controls essential bodily functions including body temperature, sweating, heart rate, blood pressure, pupil dilation, and digestion without conscious control. As per the question, the increase in heart rate and mouth becoming dry are controlled by sympathetic nervous.

a token economy

Explanation:

In a nutshell, we can say that a token economy is a system that seeks to reinforce the execution of beneficial behavior for an individual. In this type of reinforcement, each time an individual behaves in the desired and correct way, he receives a card, or any other object, which will serve as a token for him to exchange for a reward, after accumulating a specific number of tokens. An example of this is seen in the question above, where Simon's caregivers wanted him to interact more with people. So, whenever he interacts with someone, he gets a red card that he can accumulate to exchange for a prize.