Question

which happens to a body of water if there is too much nitrogen present?
a. there is a decrease in turbidity.

b. there is an increase of algal growth.

c. there is an increase in dissolved oxygen.

d. there is an increase in animal and plant diversity.

Explanation:

Excess nitrogen in water (eutrophication) causes algal blooms (increased algal growth). Turbidity decrease is incorrect (algae can increase turbidity or it's not the main effect here). Algal blooms deplete dissolved oxygen (so C is wrong) and reduce biodiversity (so D is wrong). So the correct effect is increased algal growth.

Answer:

B. There is an increase of algal growth.