Which planet is most similar to Earth?

The planet that most closely resembles Earth is Mars, the fourth planet in the solar system.
The main role in this was played by its geographical location to the Sun.
It is somewhat colder than the Earth, since it is further away, but its temperature parameters are still suitable for human settlement.
It has been proven that on the surface of this planet, life previously boiled with a large number of rivers and seas.
Due to the existence of an atmosphere containing carbon dioxide, nitrogen and small amounts of oxygen, there is an assumption that primitive life forms may exist on Mars.