Answer:
solute: sodium hydroxide
solvent: water
Explanation:
A solute is a substance or matter that is been dissolved in a solvent to form a solution. The substance or matter usually liquid or gas that dissolves another is known as the solvent.
A solution contains a solute and a solvent. A solvent dissolves the solute to form a solution.
From the question solid sodium hydroxide was dissolve in a liquid known as water. The liquid which is water is known as the solvent because it dissolves the solute which is a solid .
Sodium hydroxide is the solute while water is the solvent