How does fertilizer affect the quality of crops?​

Fertilizers replace the nutrients that crops remove from the soil. Without the addition of fertilizers, crop yields and agricultural productivity would be significantly reduced. That's why mineral fertilizers are used to supplement the soil's nutrient stocks with minerals that can be quickly absorbed and used by crops

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.

the correct answer is b