During the melting of a crystal lattice,what happens to the structure of the solid?

Which of the following does not possess a crystalline structure?

Why are amorphous solids called pseudo solids or supercooled liquids?

Quartz is a crystalline variety of

Why are solids incompressible?

Given below are two statements.
Statement $I$ : $O_2, Cu^{2+}$ and $Fe^{3+}$ are weakly attracted by magnetic field and are magnetized in the same direction as magnetic field.
Statement $II$ : $NaCl$ and $H_2O$ are weakly magnetized in opposite direction to magnetic field.
In the light of the above statements,choose the most appropriate answer from the options given below: