Question

increasing the amount of heat in a pot of boiling water.....
changes nothing.
increases both the rate of boiling and the temperature of the water.
increases the temperature but not the rate of boiling of the water.
increases the rate of boiling but not the temperature of the water.

Explanation:

When water is boiling, it's at its boiling point (e.g., 100°C at standard pressure). Adding heat (increasing heat input) provides more energy for the phase change from liquid to gas, so the rate of boiling (how fast water turns to steam) increases. However, the temperature of the boiling water remains constant at the boiling point because the added heat is used for vaporization, not raising temperature. So the correct option is the one stating it increases the rate of boiling but not the temperature.

Answer:

The option "Increases the rate of boiling but not the temperature of the water." (the fourth option in the display)