Answer: b. concentrated
Explanation: A solution is made by mixing two components, solute and solvent. The component which is present in less quantity is called as solute and the component which is present in large quantity is called as solvent. Thus here powdered ice tea is solute and water is solvent.
A solution is said to be concentrated if more amount of solute is added to a solution and it is said to be dilute if more amount of solvent is added to a solution.
Thus when powdered mix is added, more solute is added and thus the solution get concentrated.
