The part of the nervous system that is known as the "fight or flight" system because it arouses the body to meet emergencies and respond to emotional events is the branch.

The answer is sympathetic. It is one of two components of the autonomic nervous system; the other being parasympathetic. The other function of the sympathetic system is to maintain body homeostasis. Acetylcholine is the main neurotransmitter in the preganglionic sympathetic neurons while noradrenaline (norepinephrine) is the main neurotransmitter in the postganglionic sympathetic neurons.

explanation:

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.