Final answer:
An aqueous solution is water with another compound dissolved in it, encompassing a variety of dissolved substances such as solids, gases, or liquids.
Step-by-step explanation:
An aqueous solution is defined as water with another compound dissolved in it. This can include a wide variety of dissolved substances such as solids, gases, or other liquids. Electrolytes, for example, are compounds that disassociate into ions when dissolved in water, making the solution capable of conducting electricity. Common examples of aqueous solutions include vinegar, which is acetic acid in water, alcoholic beverages that consist of ethanol in water, and many liquid medicines which are various drugs dissolved in water. Water's molecular dipole allows it to stabilize ions in solution, underscoring why it's such an effective solvent for polar and ionic compounds.
Given the choices in the question, the correct answer is (d) water with another compound dissolved in it.