To write an informative essay with clear style, the writer needs to use appropriate language for the audience and should organize sentences into separate categories. include details that are unrelated to the main ideas. describe complex topics in a straightforward way. create an informal, emotional tone.

c

Explanation:

i just took the test

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.

i believe the answer is:   psychological  experiment

in this experiment, wilhelm wundt became the first person that implement scientific method in analyzing the pyschological phenomenon.

due to this result, wilhelm wundt also able to make psychology to be acknowledged as a separate scientific field from biology.