Answer:
The air
Explanation:
the air has a component of 79% of nitrogen gas (N2)
Since nicotine is a form of a stimulant drug, in cigarette smoke it can cause addiction.
Many people who smoke are actually addicted to smoking, and cannot stop doing so easily, which is similar to how drug addicts behave when it comes to using drugs.
The central nervous system is made up of mainly the brain and the spinal cord while the peripheral nervous system is divided into two types which are sensory and motor neurons. The somatic nervous system is associated with voluntary nerves while the autonomic nervous system is also known as involuntary nervous system. The sympathetic nervous system increases or speeds up a process while the parasympathetic nervous system decreases or slows down a process.
It depends on how you look at evolution. I would say B would be my answer. but it also depends on the course you take. Mine was a Christian based course. So I learned that evolution wasn't a thing.
