Whenever a new drug, device, or food, is developed for use in animals, It has to be approved by the FDA before it can be sold and marketed to the public.
Don't use the exact words, I copied it from an FDA website so change the wording first before you submit. Good luck Lol.
Answer:
B
Explanation:
The whole point of natural selection is for animals to compete to survive in that specific environment
Hope this helps!