A(n) ________ is a substance that helps in the chemical digestion of food.
My answer is C.
No. A gallbladder is not a substance at all!!
Look up those terms here. http://www.google.com
Let us know what you learn. And no guessing!
Ah. I'm sorry. I've got it. My Final Answer is B.
Got my answer by looking at a website called BBC.