Question

what problem can fertilizer runoff cause in aquatic ecosystems?
a more nitrogen fixation
b increased biodiversity
c stronger food webs
d lake eutrophication and a fish kill

Explanation:

Fertilizer runoff contains high - levels of nutrients like nitrogen and phosphorus. When it enters aquatic ecosystems, it can cause excessive growth of algae and plants (eutrophication). As these organisms die and decompose, oxygen is consumed, leading to low oxygen levels in the water which can result in fish kills.

Answer:

D. Lake eutrophication and a fish kill