Solid, liquid, gas ^^
For example, if you have an ice cube you have a solid piece of matter, but if you heat it up it melts and then it's liquid, and after getting hot enough it evaporates and even though you can't see it it's still there, but as a gas.
By the way, what's this have to do with Spanish?
D. estas
yo- estoy
tu- estas
el,ella, ud- esta
nos- estamos
ellos, ellas,uds-estan
Respuesta:
C) la boca
Yo no como con las manos; como con la boca.