The difference between crystalline and amorphous solids is determined by

regular repeating structure

Explanation:

Crystalline solids have an organized structure involving repeating units of a particular structural pattern known as the unit cell. This well organized structural arrangement is maintained throughout the solid. Amorphous substances do not have this well organized structural units hence they are not as strong as crystalline solids and lack a definite pattern of arrangement of particles in the solid.

it have destructive character

the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface.