The ethical principle of requires special interpretation when participants cannot fully appreciate the research goals and activities.

The ethical principle of Informed Consent requires special interpretation when participants cannot fully appreciate the research goals and activities. Informed Consent is the permission given by a patient to a doctor about his/her treatment knowing the risks and benefits of the said treatment.  

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.