Trade ships..................
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.
1. Biosphere
2. Lithosphere
3. All of the above
4. i dont know
Answer:
D. I.
maybe its D, I think it might be D
