Answer:
the study of the structure, reaction, and composition of different kinds of substances
Explanation:

the Fallopian tube is located in both the left lower quadrant and tight lower quadrant
You have two apples, you pick one off the tree, drop it, than drop two more. How many apples do you have George?
I'd say the answer is A. As a form of proof that the product does what it claims to do by providing evidence.