What branches are involved in order to make purchase of land in the United States?

The land and estates department works in order to make purchase of land in the US

Explanation:

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d is the correct answer.

b is incorrect because it makes food by itself

c is incorrect because us humans don't know how to produce their own food using the sun like plants.

a is incorrect because consumers can depend on carnivores for eating food for consumers to eat the dead organism. same thing with omnivores.