Final answer:
A micelle is a spherical arrangement of amphipathic lipid molecules, with nonpolar tails inside and polar heads outside. In a polar solvent with a nonpolar stain, the hydrophobic tails interact with the stain, while the hydrophilic heads interact with the solvent.
Step-by-step explanation:
A micelle is a simple spherical arrangement of amphipathic lipid molecules, with nonpolar tails aggregated within the interior and polar heads forming the outer surface. In a polar solvent with a nonpolar stain, such as oil, the hydrophobic tails of the lipid molecules would interact with the oil, while the hydrophilic heads would be in contact with the polar solvent. This arrangement allows the nonpolar stain to be solubilized and transported in the polar solvent.