Question

diagram shows the formation of a dead zone in the ocean.

is the source of the chemicals that cause the dead zones to form?
two correct answers.
□ cities
□ forests
□ ocean animals
□ ocean plants
□ farms
clear all

Explanation:

Dead zones form when nutrient-rich runoff (containing nitrogen and phosphorus) causes algal blooms. Cities contribute nutrient-laden wastewater and storm runoff, while farms contribute fertilizer runoff that carries excess nutrients into waterways, which then flow to the ocean. Forests, ocean animals, and ocean plants do not release the excess nutrient chemicals that trigger this process.

Answer:

A. cities
E. farms