Can someone please help me before I have a heart attack? A body of fresh water is shown below.

Which point in this body of water is most likely to be in the photic zone?
A. point b
B. point c
C. point a
D. point d

and please don’t answer if you don’t know it

Amino acids contain the elements carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. of the 20 amino acids found in humans, 11 are called "nonessential" because they can be manufactured by the body when needed. which elements in these 11 amino acids are commonly obtained from the metabolism of sugar molecules?