Answer:
The answer is D.) Mercury
Ecology
Ecology studies the life of living things and their environment.
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:
E
F
A
B
C
D
matched according to your questions.
Two identical DNA strands