Midwestern productivity allows the united states to

d. export crops to other countries

Explanation:

The productivity of the midwest states of the United States is attributed to the Illinois, Indiana, Iowa, Michigan, Minnesota  Missouri, Ohio which is called as the corn belts and has about 75% of the crops under the export values i.e has about 127 million acres of land. Has great adaptability to the climate change practice.

It is c. naturally in the environment

Aregion is an area of land that has common features. these features can be natural, such as climate or landscape. they can also be artificial, such as language or religion. the xinjiang uyghur autonomous region, above, is an area of china inhabited by uyghurs, a muslim group with ethnic ties to turkish people.