In the united states, party identification a. varies significantly by income, race, and gender. b. varies significantly by gender, but not by race. c. does not vary significantly by ideology. d. does not vary by income, race, and gender.

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.

credit card number 4 is the right answer