it is the only one we know about that contains life at the moment.
The first four planets (Mercury, Venus, Earth, and Mars) are known as "Rocky planets" because they have a surface that you can stand on.
You can stand on Pluto and mars because they have a solid surface. You could NEVER stand on any of the other planets. They are made of gas, If you were stupid enough to stand on one of the other planets you would die once you get on it
The other planets do have gravity.
No. Earth's magnetic field only affects earth, not other planets.
Since no one from Earth has visited another planet, and we have no indication that there is anyone on the other planets, Earth does not help other planets in any way. Why do you think there is something Earth does to help them- whoever them is.
yes, the earth and other planets revolve around the sun
Earth and the other planets are mostly made of rock.
Earth and the other planets are mostly made of rock.
The other planets actually do have seasons.
Studying the earth helps scientists to understand other planets since the earth is part of the solar system. Scientists use the features of the earth to compare them with what other planets hold.
Astronomers have found Earth-sized planets in other solar systems.