A hypotonic solution refers to a solution that has less solute and more water than another solution. Beaker 1 is hypotonic because it contains a lower percentage of solute (salt) than the solution in the bag.
An isotonic solution refers to a solution that has equal amounts of solute and water as another solution. Beaker 2 is isotonic because it has an equal percentage of solute compared to the bag.
A hypertonic solution refers to a solution that has more solute and less water than another solution. Beaker 3 is hypertonic because it contains a higher percentage of solute than the solution in the bag.
The answer is D.