Question

the use of fertilizers in agriculture has significantly altered several nutrient cycles including select one: a. nitrogen. b. oxygen. c. hydrologic. d. carbon.

Explanation:

Fertilizers often contain nitrogen - based compounds. Their use in agriculture can lead to increased nitrogen input into the environment, altering the nitrogen cycle through processes like nitrogen fixation, nitrification, and denitrification. Oxygen, hydrologic (water - related), and carbon cycles are not as directly and significantly affected by the use of fertilizers as the nitrogen cycle.

Answer:

A. nitrogen