Fertilizer in waterways can lead to an increase in a. nitrogen b. phosphorus c. algae d. all of the above

Fertilizer in waterways can lead to an increase in D. all of the above. It can lead to an increase in nitrogen because that is an important component of fertilizers, it can lead to an increase in phosphorus which is also commonly used in fertilizers as it affects the growth of plants, and all of these together lead to an increase in the number of algae, which means that D is the correct answer.

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