Arat learns to press a lever when it receives a reinforcing item, such as a food pellet, upon each press. to learn the connection between the lever press and the receipt of the food pellet, the neurotransmitter is involved.
a. serotonin
b. norepinephrine
c. dopamine
d. acetylcholine
e. epinephrine

The answer is c. dopamine.

Explanation:

Dopamine is both a neurotransmitter and a hormone. Among other things, it is reponsible for reward-behaviour association.

Although it is considered as a "pleasant" chemical by popular culture, some studies have shown that it influences our motivation to perform certain tasks, based on the possible outcomes. In other words, it helps us make decisions depending on their perceived positive or negative consequences.

answer: there were new carvings etched into the back of the sculpture and each shoulder was turned into a symbol of the birdman.