'don't talk during the movie" and "cross the street at the corner or crosswalk" are examples of

These are examples of social norms. These are the guidelines of behavior that are measured as acceptable in a crowd or civilization. People who do not keep an eye on these norms may be avoided or undergo some kind of aftereffect. Norms adjust according to the setting or state and may alter or be altered over the period.

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.

answer; clelia mosher;