Step-by-step explanation:
A mixture in which solute particles will completely dissolve in a uniform composition throughout the solution is known as a homogeneous mixture.
For example, when salt (NaCl) is dissolved in water then it completely dissolves throughout the given volume of water.
When particles of a solute are microscopically dispersed in a dispersion medium then it is known as collide. For example, milk is a collide.
A heterogeneous mixture is a mixture in which solute particles do not dissolve in a solvent and they are non-uniformly distributed in the solution.
For example, mud, cement, iron fillings in water will all form a heterogeneous solution.
When solute particles due to their large size do not dissolve in the solvent then this type of solution is known as suspension. For example, vinegar in water is a suspension.
Thus, we can conclude that salt is the substance that form a homogenous mixture when mixed with water.