The correct answer is C. Nutrient depletion
Step-by-step explanation
Nutrient depletion occurs due to the persistent degradation of soil, which is caused by natural phenomena but mainly due to human activity such as monoculture (having the same crops constantly) and deforestation. It is present on all continents (except Antarctica) and affects millions of people worldwide. Considering this causes the soil to lose its properties and therefore, the biological productivity of the soil to be reduced or lost. So, the correct answer is C. Nutrient depletion