Answer: B. Mercury has a thin atmosphere
Explanation:
Mars, Venus, and Earth are similar. However, the most accurate statement is that Mercury has a thin atmosphere.
Mars has an atmosphere made up of gases - mostly carbon dioxide (and nitrogen and argon).
Mercury has a very thin atmosphere made up of atoms from solar wind - it has almost no surface pressure.
Venus has a gas atmosphere of carbon dioxide, but is hotter and more dense than earth.
Earth also has an atmosphere made from layers of gases - air.
