The process in which policy is created through the combined efforts of interest groups, a state agency, and a legislative committee is

The Iron Triangle.

Explanation:

The Iron triangle is a relationship that exists between government or state agencies, legislative committees and groups with special interests, where they all benefit from each other in some way and contribute towards forming policies.

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.