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

-agricultural runoff

-dead zoning

-deforestation

-erosion

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.

if your own plato the answer is b. the fern transitioned from sporophyte generation to gametophyte generation.