Question

multiple choice question
ozone is a highly reactive

molecule of oxygen comprised of three atoms that absorbs ultraviolet radiation from the sun
atmospheric element that forms when carbon dioxide comes into contact with chlorine
form of sea spray that acts as a nucleation site for rain droplets
gas that smells like sulfur and blocks the suns rays in the lower atmosphere

Explanation:

Ozone ($O_3$) is a molecule made up of three oxygen atoms and is known for absorbing UV - radiation from the Sun. It is not formed from carbon dioxide and chlorine, not a form of sea - spray, and does not smell like sulfur and block the Sun's rays in the lower atmosphere.

Answer:

molecule of oxygen comprised of three atoms that absorbs ultraviolet radiation from the Sun