Answer: Option (c) is the correct answer.
Explanation:
Melting is defined as the process in which a solid phase of a substance changes into liquid phase. And, a process in which liquid state of a substance changes into gaseous phase.
When we heat a solid substance then its molecules absorb heat energy and bonds between its atoms tend to break down. As a result, molecules gain kinetic energy and solid changes into liquid state.
Upon further heating, more kinetic energy is gained by molecules of a liquid. As a result, liquid changes into vapors or gaseous state.
Thus, we can conclude that the names for phase changes A and B are A is melting and B is evaporation.
