Which of these planets is Earth? Explain your answer.

Answer:
It's planet B
Explanation:
It has oxygen and everything needed to live and the temperatures are liveable for humans. 78% nitrogen, 21% oxygen, 1% other. Also according to the table, planet B is 1 AU from the Sun and the atmospheric pressure on the planet’s surface is 1 bar. Also, the planet’s atmosphere contains oxygen, which is essential for life. These are the properties of Earth. So, planet B is Earth.