Question

select the best evidence to support the statement that corn fields are plentiful in america. the landscape that corn has made in the american middle west is unmistakable....corn the plant has colonized some 125,000 square miles of the american continent, an area twice the size of new york state; even from outer space you cant miss it. it takes a bit more looking, however, to see some of the other landscapes that corn the commodity has created, in obscure places like garden city, kansas. here in the high plains of western kansas is where americas first feedlots were built, beginning in the early fifties. from michael pollan, omnivores dilemma. copyright 2006 by michael pollan

Explanation:

The text describes the abundance of corn fields in the American Middle West, with details like the area colonized by corn (125,000 square miles, twice NY State) and examples like Kansas. This relates to agricultural landscapes, and in the Natural Science subfields, Biology (specifically agriculture - related) or Environmental Sciences could apply, but the focus on the landscape and corn's colonization of the area (ecological/agricultural context) fits Natural Science, subfield Biology (agriculture) or Environmental Sciences. However, since it's about the prevalence of corn fields, the key evidence is the area (125,000 sq miles, twice NY) and the landscape description. The best evidence is the statement "Corn the plant has colonized some 125,000 square miles of the American continent, an area twice the size of New York State; even from outer space you can't miss it" as it quantifies the vast area, showing corn fields are plentiful.

Answer:

The evidence is: "Corn the plant has colonized some 125,000 square miles of the American continent, an area twice the size of New York State; even from outer space you can't miss it."