Answer:
B. is a waste product of respiration
D. is the leading cause of the greenhouse effect
E. is released when fossil fuels are burned
Explanation:
Carbon Dioxide is indeed a waste product of respiration. When cells use the process of respiration to make energy from glucose, they produce carbon dioxide as a waste product.
Carbon Dioxide is also the leading cause of the greenhouse effect which leads to sun rays being trapped on earth and and therefore heating it up more than it should be.
Carbon dioxide is stored in dead plants and animals which are the basis for fossil fuels so when these are burnt, carbon dioxide is released.
This is just the basic random sampling. 120 students were chosen at random from all classes and every student had the same chances of getting chosen. Things like social background or race were not taken as a criteria for getting chosen, nor did things like gender. Everyone was chosen at random.