Which evidence would BEST support the claim that using synthetic fertilizer can be harmful to the environment?

Question

A.
an increase in the number and kinds of microorganisms found in a farm field after the application of synthetic fertilizer to the soil

B.
an increase in certain nutrients and algae growth in a lake near a farm field after the application of synthetic fertilizer to the soil

C.
an increase in the number and size of vegetables produced in a farm field after the application of synthetic fertilizer to the soil

D.
an increase in the number of weeds and a decrease in the number of pest insects in a farm field after the application of synthetic fertilizer to the soil

Answer 1

The evidence that would BEST support the claim that using synthetic fertilizer can be harmful to the environment is:

B. an increase in certain nutrients and algae growth in a lake near a farm field after the application of synthetic fertilizer to the soil

This option indicates a consequence of using synthetic fertilizers, specifically the potential for nutrient runoff that can lead to algal blooms in nearby water bodies. Algal blooms can deplete oxygen in the water, harm aquatic life, and disrupt ecosystems, thereby demonstrating the environmental harm associated with synthetic fertilizer use.