Some areas of an ocean are known as dead zones. These zones form when excess organic material decomposes. This increased decomposition uses up the oxygen from the water. Which human activity is most affected by the increasing number of dead zones in the ocean?

Water Pollution

Explanation:

Dumping trash in the ocean and the smoke from factories goes in the water which makes the ocean more acidic and having less oxygen.

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It's B) Commercial fishing, because fish cannot survive without oxygen

the aswer is letter c