Why is earth the planet to live on?

Answer 1

Earth has oxygen, water, plants and other animals that have a symbiotic relationship in which many interconnected webs help perpetuate the continual renewal of earth's resources. More specifically, the animals on earth have adapted to Earth's conditions and are probably not suited to another planet's, as far as we know.

The planet Earth is the only habitable planet that we have. There may exist other habitable planets in the universe, but we have no way of getting to them. We did visit the moon in 1969, but the moon is not habitable.

If it should ever happen, as Science Fiction writers love to imagine, that someday we have interstellar spaceships capable of travelling faster than light, then we may very well wind up living on other planets than Earth, although even then we will probably continue to have a special fondness for Earth, the planet of our origin. (Or to quote Julia Ecklar, God lives on Terra. Look it up on YouTube.)