- ______________________________Defination-SolidA state of matter where the molecules are closely Packed to each other.EXAMPLE: Ice______________________________Defination-LiquidA state of matter where the molecules are not so TIGHTLY or loosely packed. EXAMPLE: Water ______________________________Defination-Gaseous stateThe state of matter where the molecules are very loosely packed. EXAMPLE: Water vapours===================================SolidSolids are incompressible.______________________________Explaination: Why the answer isn't GASES??=> Gases are highly compressible, as the molecules are loosely packed and scattered all around COMPARED to SOLID and liquid. => The distance between molecules decrease with the increase in pressure.______________________________Why the answer isn't Liquid??=> Liquids need a LOT of pressure to be compressed, they have very less space between their molecules. => As read above the distance between molecules decrease with the increase of pressure. => As liquids have less molecular space,it's considered to be hard for liquids to compress .______________________________Why the answer is Solid??=> Solids are the ones having no space between molecules. Liquids are considered to have more molecular space compared to solids. => Therefore they can't be compressible.______________________________Hence, the answer is Solids______________________________