The correct option is C which is eutrophication.
Lakes can disappear due to eutrophication.
Explanation:
Eutrophication can be cause by natural processes and human activities both of which can cause lakes to disappear.
When lakes organism die, bacteria break down their bodies and release nutrients into the water. Overtime, excess nutrients can build up in a lake. This process is know as eutrophication, which is a natural process.
In the same manner, due to flow of fertilizer and manure into the water bodies such as lakes, excess nutrients can build up in a lake which will again cause eutrophication.
When algae uses this plentiful nutrients and grow into a thick layer that blocks sunlight from reaching lake plants. due to this lake plants die and the animals that eat them die as well. Decaying material piles up and the lake becomes shallower and eventually fills in.
Hence,lakes disappear due to eutrophication.
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