What happens to most of the nitrogen in a plant when the plant dies?
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A. It goes back into the soil.
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B. It remains in the dead plant.
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C. It moves into the atmosphere.
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D. It is absorbed directly into animals.

A) Goes back into the soil

Explanation: Nitrogen is the part of amino acids, nucleic acids, chlorophyll and other pigments of the plant. When the plant dies the plant body gets decomposed by the soil microbes like fungi and bacteria. These microbes turn the nitrogen into ammonia in the soil which is again utilized by the living plants for their growth.

Gravitational force i believe

In some developing nations the percentage of the animal protein from fish in the diet can be as high as 25 percent.  about 85% of fish caught is used for human consumption.  the remainder is converted into fishmeal and fish oil.