What is the main avenue by which phosphorus returns to the ocean?

Question

Quizplus · Accepted Answer

The main avenue by which phosphorus returns to the ocean is through surface runoff, as it can be carried by water from agricultural and urban areas. Phosphorus can also be deposited in the ocean through dust, but this is not the primary pathway. Dissolved phosphorus in rainwater and wastewater can also contribute to the phosphorus in the ocean, but these sources are not as significant as surface runoff.

What Is the Main Avenue by Which Phosphorus Returns to the Ocean