The correct answer is the drive theory of motivation.
The drive theory of motivation states that individuals are motivated to perform certain actions and behaviors in order to fulfill desires and urges that are inborn and important for our survival. According to this theory, the reduction of our drives (urges) is what underlies motivation. For instance, we are motivated to obtain food in order to fulfill our biologically inborn drive of hunger.
The correct answer is endorphins.
During strenuous exercise, the brain releases the neurotransmitter called endorphins. Endorphins are known as "feel good" chemicals that produce a feeling of euphoria, reduce anxiety and the ability to experience pain. Endorphins also produce a feeling of happiness and relaxation after an intense exercise session.
b. barter economy
Simple trading, no money involved. (Also the definition of barter)
B. Raise income taxes in all us people in the US
Explanation:
Brass is a metal alloy that is always made with a combination of copper and zinc. By varying the amount of copper and zinc, brass can be made harder or softer. Other metals—such as aluminum, lead, and arsenic—may be used as alloying agents to improve machinability and corrosion resistance.
