When walking to his car late at night, otto is extra vigilant and his body is on alert for danger. these responses are due to the actions of the system.

Sympathetic

Explanation:

The sympathetic system is a nervous system which makes the body to stay alert and directs the body to be vigilant. It can be considered as an involuntary response towards potential danger or a response to a stress. This is done by directing extra blood to the limbs and by increasing the heart rate. Here, Otto is being extra vigilant and his body is on alert for danger and therefore, the answer is sympathetic system.

explanation:

with the profits from the european sales, merchants purchased europe's manufactured  goods, including tools and weapons. then the merchants shipped those manufactured  goods, along with the  american  sugar and rum, to west africa where they were bartered for  slaves.

answer; interpreting someone's past consistent with present deviance;