Because it is the only planet that have oxygen and have water and food on it.
You can walk on any of the inner planets. The outer planets (Jupiter, Saturn, Uranus, Neptune) you cannot walk on; they are made entirely of gas. This is only a guess, but Pluto is probably solid enough to walk on.
The only planet on which people have walked on Earth. The only world other than Earth where people have walked is the moon, but the moon is not a planet.
There is not fifth planet on Earth, since Earth is a planet...
It's not.
Earrrrrth is the thirrrd closest planet Eva
If man developed on this planet first and only, then the Earth or Tellus is the only planet inhabited by man. It might be disputed if our planet is the first one or the only one. Science does not know for certain but the odds with to days knowledge are against theories of man coming to earth from other planets.
Earth
no, because the moon isn't a planet, and earth is the only one.
No, only the moon has been stepped on by man, other than the earth.
The earth is the only planet on earth.
As far as we know, the only planet that human beings have walked on is the planet Earth; we have also walked on the moon, but that is a satellite, not a planet.
Planet earth is the only planet that we know of that has life on it.
No man or Woman has ever stepped on another planet. The only celestial body that humans have been to (other than Earth) is the Moon.
Earth is the home to man
Earth is a are home planet ,and the only planet that contains life
No, Earth is not the only planet with lava (magma), Venus has a molten core as well as Earth.
planet earth is known for being the only planet to support life