Question

Which of these human activities is a serious threat to marine ecosystems? A) Fishing in estuaries. B) Dumping wastes in landfills. C) Sinking chemical wastes in the ocean. D) Burning wastes rather than dumping them in landfills.

Answer 1

Sinking chemical wastes in the ocean is a serious threat, because the chemicals will poison all the living things around it. so the correct answer is C.
     Hope this helps !

Answer 2

Sinking chemical wastes in the ocean is a serious threat to the marine

ecosystem.

The marine ecosystem comprises of water bodies such as seas, oceans etc

which have living and non-living organisms present in them. Example of

organisms include planktons, fishes, crustaceans etc.

When chemical wastes are deposited in the ocean, it leads to poisoning

and death of the organisms living in the habitat.

It can also lead to oxygen depletion which causes decrease in reproductive

rates and death too due to lack of oxygen for respiration and survival.

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