The rivers that feed a particular inland sea were diverted to irrigate a nearby desert so that the desert could be used to cultivate cotton. uncontrolled irrigation resulted in a drastic decrease in the size of the sea, and eventually the sea dried up completely. many aquatic populations were lost, and the land left behind was covered with salt.

which of the following solutions would best restore the ecosystem and prevent it from becoming a desert?
a.
direct sewage runoff water from local cities into the ecosystem to provide it with nutrient-rich water.
b.
reconstruct the irrigation system so that water from the river is allowed to enter the ecosystem.
c.
add synthetic fertilizer to the remaining soil in the ecosystem so that soil fertility increases.
d.
plant cotton crops in the ecosystem and grow the same crop for at least a decade.

The best solution to restore the ecosystem is to add synthetic fertilizer to the remaining soil in the ecosystem so that soil fertility increases.

Option C

Explanation:

For the mentioned problem, it is observed that the main cause for the drying up of sea is simply the Uncontrollable irrigation. The first and last options mentioned will definitely do not work.

Because in this case we require a long term solution, and that can be done by adding synthetic fertilizer. Today, modern agriculture mostly depends on such inorganic fertilizers.

The advantages of using such fertilizer are plenty. They not only increase the fertility of soil, but they also act immediately. And in this case, such immediate effect is necessary, later one can think of some other long term solution.

b is the answer for this question.

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