Biology

The correct answer is: B.Use of phosphorus fertilizers.

Explanation:

A significant human impact on the phosphorus cycle is the use of phosphorus fertilizers. These fertilizers, commonly applied in agriculture, add large amounts of phosphorus to soils to boost crop yields.

However, excessive use can lead to nutrient runoff into nearby waterways, contributing to water pollution and eutrophication, where excessive phosphorus leads to harmful algal blooms and oxygen depletion in aquatic ecosystems.

Let's look at the other options:

A.Solar radiation management: This is a geoengineering technique designed to mitigate climate change by reflecti...