When a solute is added to a solution, why does it remain homogeneous?

When a solute is added to a solution it remains homogeneous because the solute dissolves and is evenly distributed among the solution.

For a solution to not be homogeneous it must have distinguishable parts that  are different from the base of the solution. As an example, a salad would not be a homogeneous solution because you can distinguish the different parts just by looking at it.

An example of a homogeneous solution would be salt water because the salt completely dissolves into the water.

Hope this helps and have a nice day! :)

Because of the intermolecular space present in the solution,the solute gets dissolved in these spaces hence,making it uniform throughout the solution.