Plz , just explain which one of kmt explainswhich kinetic molecular theory explains why gases are compressible?

I wish i could answer i recently learned this one and its at the tip of my tounge but i realy cant remember

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.