Atom: the basic unit of an element
Element: a tiny piece of matter
Phase: a unique form of matter in which it can exist
Particle: a substance that cannot be broken down into a simpler substance
Atom: D (this is correct)
Element: A (this is correct)
Particle: B (this is correct)
Phase: C (this is also correct)
All of these should be correct
Have a great day :)
