Use the incomplete diagram below, illustrating some of the steps involved in eutrophication to answer the following question.
A---> algae grow faster --> algae die -->Dead algae and plants accumulate-->(B)-->Dissolved oxygen levels fall-->aquatic animals suffocate and die.
A. increased temperature
b. elimination of sunlight
c. increased sunlight
d. fertilizers washed into the lake
e. increased UV radiation
Answer: d
A---> algae grow faster --> algae die -->Dead algae and plants accumulate-->(B)-->Dissolved oxygen levels fall-->aquatic animals suffocate and die.
What would be a likely entry for A?
A. increased temperature
b. elimination of sunlight
c. increased sunlight
d. fertilizers washed into the lake
e. increased UV radiation
Answer: d