Answer:
The transition that requires the absorption of the greatest amount of heat energy is boiling the water at its boiling point.
Boiling water at its boiling point requires a significant amount of energy because it involves the phase transition from a liquid to a gas. During this transition, the water absorbs heat energy to break the intermolecular bonds and convert from a liquid state to a gaseous state. This process requires a large amount of energy compared to other transitions such as warming up the water or ice, where the temperature changes within a specific phase.
Therefore, out of the given options, boiling the water at its boiling point requires the absorption of the greatest amount of heat energy.
Step-by-step explanation: