Final answer:
During a change of state, heat stays the same and temperature remains constant until the transition is complete. heat energy is used to change the state rather than altering the temperature.
Step-by-step explanation:
As a change of state takes place, heat stays the same, and temperature stays the same. the correct option is B) stay the same, stay the same. When a substance is undergoing a change of state, such as melting, freezing, boiling, or condensing, energy in the form of heat is either absorbed or released, but the temperature remains constant during the transition. This phenomenon is because the heat energy is used to break or form the intermolecular forces between particles rather than changing the temperature.
For example, when ice melts into water, energy is absorbed to break the bonds holding the water molecules in a solid structure, but the temperature does not change until the change of state is complete.