The identity of planet A is Mars, while the identity of planet B is the Earth.
What is Planet?
The Planet may be defined as a type of celestial body that orbits around the sun.
Mars has an atmosphere rich in carbon dioxide, the surface of it is red, and has a few clouds, while the Earth has an atmosphere that is rich in oxygen (21%), the surface is covered with water, and contains many clouds.
Therefore, it is well described above.
To learn more about Planets, refer to the link:
https://brainly.com/question/1286910
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