Answer:
im pretty sure its d. competition
Explanation:
Hostility is the emotion particularly related to Coronary Heart Disease. Hostility by definition is having stable attitude of harboring ill-feelings and negative perception towards others and even on events. According to some literature, purely speculative in nature since the researchers weren't able to measure them,such predictive effect of hostility towards CHD is brought about by elevation of stress hormones and other factors.
Axon: the messenger cell that carries the command to contract muscles.
Answer:
a layer or a series of layers of rock in the ground. ,
a level or class to which people are assigned according to their social status, education, or income.
Explanation:
