This is the opposite of the new technique. many advertisers invoke a time when life was simpler and quality was supposedly better ("like mom used to make"). this refers to:

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.