Why does temperture stay constant during a phase change

Explanation:

During a phase change, the temperature remains constant because the energy supplied via heat is used differently. While not changing states, the heat (energy) goes into changing the kinetic energy of every particle in the body that receives it.

answer; ///i do believe that the correct answer is (b); ///particle composed of two or more atoms bonded together;

catya your not at all which answer i've seen you do this on another question!