Answer:
The correct answer to the statement: Fertilizers in waterways can lead to an increase in:________, would be: D: All of the above.
Step-by-step explanation:
The reason for this comes from the chemical products that are often used in fertilizers in order to control the growth of unwanted bushes and plants that can damage crops, or damage the land. Most of these fertilizers contain at their base either phosphorus, or nitrogen, in different forms, and these are meant to control fungus, pests, and other plagues. However, these elements, nitrogen and phosphorus, are flushed when it rains, into waterways, and an excess of them in water causes algae, which are natural dicontaminants, to grow where these elements abound. This is why the correct answer is D.