The statement is true. Dead zones are the zones of oxygen depletion, which is caused by excessive running off of the fertilizers into the water body. These chemicals, particularly the nitrates, which are used by algae etc. which bloom by using the nitrates and use the oxygen present in the water. When they die, oxygen levels become critically low till then, for other aquatic animals like fishes etc., to survive.
Answer:
D
Explanation:
coughing when the throat is irritated
Answer:
ok yes it changes but what is the question
Explanation:
This is the excretory system
The Earth's interior and the sun.
