Answer:
Solute : Chocolate
Solvent : Milk
Step-by-step explanation:
Solute - Substance dissolved in the solvent.
Solvent - The substance in which the solute is dissolved.
Since the Chocolate is dissolved in milk, Chocolate is solute and milk is the solvent.
Imagine that there is a cup of milk and you add chocolate to make chocolate milk. Something you add to solvent is solute.