Why does Canada have greater trade with United States than any other country?

Canada is the largest foreign supplier of crude oil and natural gas to the United States, this  relationship has enhanced U.S. energy security and provided Canada with a steady demand for its energy exports.

Explanation:

i think the answer is true

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.