Question

Manuel approaches his psychology professor about the possibility of using the rats in the college's animal lab to conduct a psychological study. his professor appropriately reminds him that if his use of animals is to be in accord with ethical principles, his research must have an acceptable scientific purpose and that he should expect it to:

Answer 1

I believe the answer is: increase knowledge about species, behavior, or benefit the health or welfare of humans or nonhuman animals

Scientific purpose refers to actions that are being done in order to obtain, develop a knowledge or techniques, and proof the validity in any area of science. The end goal of such actions is to potentially create a new or better solution for humans' problem that we face today.