Consider the graph of carbon dioxide emissions by various fossil fuels in the United States.
From 1990 to 2017, which fossil fuel released the most amount of carbon dioxide into the air each
year?
Figure 3. Energy-related carbon dioxide emissions by fuel, 1990-2017

Oil

Explanation:

In the graph you can see that the bottom line corresponds to the emissions of the natural gas, the second line corresponds to the coal, and the top line corresponds to the emissions of the oil.

You can see that the emissions of the oil are always bigger than the other two, and never intersects them (it is always above the 2000 line). From this, we can know that the fossil fuel that released the biggest amount of carbon dioxide each year is the oil

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.

the answer is "a.) well–developed vascular system."

explanation: