By a window? I don't know if you have multiple choice on the question but she should put it where there is sunlight.
1) a five carbon ribose sugar
2) a phosphate molecule
3) one of four nitrogenous bases: adenine, guanine, cytosine or uracil
The present is the key to the pats because what you have done in the past is what has now brought you to where you are now, it was the stepping stones
The part of the phospholipid bilayer that interacts with water would be the hydrophilic portion consisting of the polar phosphate group. The hydrophobic tails which are the fatty acid chains will not interact with the water present in the aqueous environment.
Letter A is the answer.
Ur welcome hope this helped