Question

the study of right and wrong; environmentalism; natural resource; ethics; independent variable

Explanation:

The phrase "the study of right and wrong" is the definition of ethics. Among the options, "ethics" matches this definition. Environmentalism is about environmental protection, natural resource is about resources like water, air, etc., and independent variable is a concept in research/statistics. So the correct option is the one with "ethics".

Answer:

ethics (the option with "ethics" in the green box)