Lawn fertilizers often contain phosphorus. Sometimes these fertilizers runoff into lakes. Once in a lake, the excess phosphorus may affect algal
growth and cause eutrophication in the lake. Which BEST describes how
the phosphorus affects the algae?
A. It increases the number of trophic levels algae occupy.
B. It increases the carrying capacity of lakes for algae.
C. It improves algae adaptability.
D. It reduces algae habitat size.