Why is charcoal a limited drawing medium?

Charcoal is a limited drawing medium (like pencil) because you can only create artforms in a Monochromatic scale - Black (your charcoal medium) to white (or whatever color your canvas is). It has a single color value and is irreversible once used.

Photojournalism adds emphasis and power. if some one told you that a bomb blew up the world trade center, you wouldn’t have believed them until you saw it on the tv or in the newspaper.

Ais the correct one.