Diamond is
the hardest mineral on the mohs scale
a no nonmetallic element
the only mineral with luster
an isotope of silicon

A would be correct. It’s the hardest mineral.

the elements of art are the visual tools that the artist uses to create a composition. these are line, shape, color, value, form, texture, and space.

the principles of art and design are balance, contrast, emphasis, movement, pattern, rhythm, and unity/variety.

it's c.us forest service