The correct answer is C. Chlorine.
Nitrogen (78%), oxygen (21%), argon (0.9%), carbon dioxide (0.04%), and other gases (0.1%) make up the Earth’s atmosphere. Chlorine is not one of these gases.
Nitrogen is a colorless, odorless gas that makes up about 78% of the Earth’s atmosphere. It is essential for plant growth and is used in the production of ammonia, fertilizers, and explosives.
Oxygen is a colorless, odorless gas that makes up about 21% of the Earth’s atmosphere. It is essential for respiration and is used in the production of steel, glass, and other products.
Argon is a colorless, odorless gas that makes up about 0.9% of the Earth’s atmosphere. It is used in lighting, welding, and other applications.
Carbon dioxide is a colorless, odorless gas that makes up about 0.04% of the Earth’s atmosphere. It is a greenhouse gas that contributes to climate change.
Other gases in the Earth’s atmosphere include neon, helium, methane, and ozone. These gases make up a very small percentage of the atmosphere.