Which statement best relates to how the structure of a lipid influences the lipid’s function

The ends of the lipid are attached to each other.
Lipids contain fatty acids and glycerol.
A lipid is made up of a long chain of phosphorus molecules.
A phospholipid has a charged head and an uncharged tail.

A phospholipid has a charged head and an uncharged tail.

"Lipids contain fatty acids and glycerol."
That is true for fats and oils but it doesn't really say anything about the structure influencing the function. In the case of phospholipids the charged head and uncharged tail is what makes it form a lipid bilayer.
http://en.wikipedia.org/wiki/Phospholipi…
http://en.wikipedia.org/wiki/Lipid_bilay…