The digestive system is parrallel to the excretory system, but not part of it. The digestive system is where the digestive process of getting energy from food. The excretory is where the blood enters the nephron. It filters out any kind of waste. The excretory is where the urine comes from. The digestive system doesn't produce urine. Urine is transported from the kidneys to the bladder. It does work together for the use of the body like basically everything in your body.
Answer:
Human activity is the main cause of climate change. People burn fossil fuels and convert land from forests to agriculture. Since the beginning of the Industrial Revolution, people have burned more and more fossil fuels and changed vast areas of land from forests to farmland.
Explanation:
Plants get nitrogen from the soil but it has to be turned into nitrates (by lighting or nitrogen fixation); this because nitrogen in the air is very unreactive, Then the animal eats the plant.
Bacteria can get nitrogen simply from the air
