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Very good! The material that dissolves is called the solute. As sugar is dissolving in the water, sugar is the solute.
Normally, when people say solution, they mean that the solvent is a liquid. But, that is not necessary. We can have solid and gaseous solvents as well.

For example, steel is a homogeneous mixture (that is, a solution) of iron and carbon. When the solvent is a metal, the mixture is called an alloy.
What about air in the atmosphere (ignoring pollution)? Is it a solution?
  • Yes
  • No