The following figure is the phase diagram for water.

How is skating on ice, which is solid water, possible?

When someone skates on ice, the skate blades apply heat on it, which causes it to melt, creating a layer of liquid that makes it possible to glide across the ice.

When someone skates on ice, the skate blades apply pressure on it, which causes its melting point to decrease, melting some of it and creating a layer of liquid that makes it possible to glide across the ice.

When someone skates on ice, the skate blades apply pressure on it, which causes its melting point to increase, melting some of it and creating a layer of liquid that makes it possible to glide across the ice.

Cannot be determined