Question

hydrophilic molecules readily associate with
water molecules.
salts.
hydrophobic molecules.
acids.
lipid molecules.

Explanation:

Hydrophilic means water - loving. Hydrophilic molecules have an affinity for water molecules due to their polar nature which allows them to form hydrogen bonds or other interactions with water. They do not readily associate with hydrophobic (water - fearing) molecules like lipids, and while they may interact with salts, acids to some extent, their most characteristic association is with water.

Answer:

water molecules.