Respuesta :
When a substance undergoes fusion, it melts.
Fusion is a physical process. The process of fusion of substances takes place during the conversion of a solid substance into a liquid.
For this process to take place, heat is being applied to the solid substance, and the particles of the solid loose, then move freely thereby reducing the intermolecular forces in the solid substance before changing into liquid.
Learn more about physical changes here:
https://brainly.com/question/25014732?referrer=searchResults
