Environmental science is the study of a. organismal relationships b. human impact on the earth c. ecosystems d. all of the above

I believe the answer is D. All of the above

Option D

Explanation: Environmental science can be defined as the branch of science in which the interaction between the organisms, the interaction between the human beings and environment and the interaction between the abiotic components of the ecosystem and many more.

The organism- organism relationship, effects of human activities on environment, effects of animals on environment and many more criteria lies under environmental science.

b is the best answer for this question.