Question

the fatty acid in the tail of a phospholipid molecule are

Answer 1

possibly looking for "hydrophobic"?

Answer 2

or chains of hydrocarbons, or nonpolar.

Answer 3

Lipids. Fats that you take in from your food is used to build membranes. Membranes can be represented by models such as The Fluid Mosaic Model, which displays the phospholipid bilayr, and other tissues on the membrane.
The fatty acids in the tail of a phospholipid molecule are non-polar and hydrophobic.