Question

When extra nutrients added to crops wash into
waterways and oceans, this is called:

-agricultural runoff

-dead zoning

-deforestation

-erosion​

Answer 1

Answer:

I think, dead zoning is answer.

Explanation:

Hope it helps you.

Answer 2

Answer:

dead zoning

Explanation:

dead zones are formed when excess nutrients wash into bodies of water (this is known as eutrophication.)

because of excess nutrients organisms can't survive, that's why those areas are regarded as dead zones.