When thermal energy is applied to ice, the ice’s temperature rises until 0° C and then stays the same for a period of time. In 1–2 sentences, explain why this takes place

This takes place because the applied thermal energy is being used to break the intermolecular bonds between the water molecules in the ice, causing a phase change from solid to liquid, but the temperature remains at 0° C during this process until all the ice has melted.