After harvesting and selling a crop of corn, a farmer collects the corn stalks and feeds them to her cows. Why should the farmer add fertilizer containing nitrogen and phosphorus to the field before growing another crop?

The prepare the soil.

Explanation:

Because the plants use the nutrients and minerals that are present in the soil in their process of growth. Feeding the stalks to the cows means that whatever nutrient is in the stalks are mostly going to be used by the cows so in order to be able to grow another crop, the soil needs to be supported with additional nutrients, minerals and elements.

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emerald ash borer

the emerald ash borer is a green buprestid or jewel beetle native to north-eastern asia that feeds on ash species. females lay eggs in bark crevices on ash trees, and larvae feed underneath the bark of ash trees to emerge as adults in one to two years. hope this !

the answer for this question would be d. glaciers