Question

how does the author make a connection between fertilizer use and damage to biodiversity in the lakes?
by explaining how fertilizer runoff pollutes the ecosystems of the lakes
by describing how excessive irrigation of fertilized farmlands depletes the lakes of water
by emphasizing that fertilized farmlands are often situated alongside the lakes
by including data that shows fertilizer runoff makes water from the lakes undrinkable

Explanation:

Fertilizer runoff can carry excess nutrients like nitrogen and phosphorus into lakes. This can cause algal blooms, oxygen - depletion, and harm to various species in the lake ecosystems, thus damaging biodiversity.

Answer:

by explaining how fertilizer runoff pollutes the ecosystems of the lakes