Answer:
What is a Phase Diagram?
A phase diagram is a graphical representation of the various phases of a substance or mixture of substances that coexist in thermodynamic equilibrium, and undergo phase changes under different working conditions, such as temperature, pressure, or volume.
The water system is divided into three phases: ICE (S), WATER (L), and WATER VAPOUR (G)
Since H2O is the only chemical compound present, as a result, it is a one-component system.
