Why do different elements emit different colors of light?

Different elements emit differently colors of light because when electrons return to the lower energy levels, they emit energy in a different form of light

Explanation:

smooth muscle is composed of involuntary muscles found within the walls of organs and structures such as the esophagus, stomach, intestines, and blood vessels. those muscles push materials like food or blood through organs. unlike skeletal muscle, smooth muscle can never be under your control.

it would be a gas formation