Answer:
e. Its temperature stays constant.
Explanation:
When a material is changing state (e.g., from solid to liquid or liquid to gas), its temperature stays constant during the phase change. Therefore, the correct answer is:
e. Its temperature stays constant.
This is because the heat energy added to or removed from the material during the phase change is used to break or form intermolecular bonds rather than increasing the kinetic energy of the particles, which would raise the temperature.