Answer:
1. phytoplankton blooms
Explanation:
- A dead zone is a zone that is created by the presence of the dead and decomposing matter of the plant an abiotic component that depletes the oxygen and thereby creating a thick layer of nutrient-rich deposits in the aquatic environment that does not support the marine and fish life.
- They may result from agricultural, industrial and urban flows. And the changes that occur with the climate changes and the seasonal cycles of the earth. There are four types of dead zones classified on their lengths.
<u>Permanent </u><u>dead zone i.e the rarely exceed 2 milligrams per liter.
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<u>Temporal </u><u>dead zones i.e the short-lived dead zone that lat flour hours a day.
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<u>Seasonal </u><u>dead zones occur annually mostly in the summer months.
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<u>The </u><u>hypoxic </u><u>zone that occurs in the night time.
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The baltic seas, Chesapeake bays, Lake Erie, and the other zone are affected by these blooms of algae and other foreign substances.
Answer:
Options (1), (3), (4) and (5)
Explanation:
The deep ocean water refers to the water that is present at the bottom of the ocean. This deep water is highly dense, and are rich in essential nutrients including oxygen. Sunlight cannot penetrate into the deeper layer, as a result of which these water remains much colder and moves at a much slower rate in comparison to the surface waves. These deep ocean currents are generated by the density differences due to two factors namely, temperature and salinity.
These currents are moved from the equatorial region to the poles and again comes back from the poles to the equator, forming a circular pattern. This circulation of water is responsible for the various climatic conditions that occur at different places.
Thus, the correct answers are mentioned above.
Through human adaption and technological innovation
The answer is all of the above.
Easter Island, Spanish Isla de Pascua, also called Rapa Nui, Chilean dependency in the eastern Pacific Ocean. It is the easternmost outpost of the Polynesian island world. It is famous for its giant stone statues.
