which is a component of a phospholipid?\ncarbon ring\nhydrophilic head\nlong - chain alcohol\namino acid

Brief Explanations:

Phospholipids have a hydrophilic head and hydrophobic tails. The hydrophilic head contains a phosphate - group which is attracted to water. Carbon rings, long - chain alcohols, and amino acids are not components of phospholipids in the context of their basic structure.

Answer:

B. hydrophilic head