Why is that the earth is the only planet that can support life?

Answer 1

earth has oxygen and water to supply humans, plants, and animals to live here.

Of the planets that we are aware of, Earth is the only one that has life forms. However, there are Billions of galaxys, each with Billions of planets, so the odds are extremely likely that there are other planets that have life forms.
Earth is the only planet that can support life (As far as we know) because we have a breathable atmosphere of Oxygen, which is essential for life to exist. We are also the perfect distance away from the sun, which means that the water on our planet does not vaporise away or freeze forever. I guess you could say we got lucky.
We are not sure that there is or is not life on othere planets... But some of things that we think a planet needs to support life are water, heat, cold, and an a atmosphere ... As far as we know... Mind you that life can live in the most inhospitable of places'...

Answer 2

There are many 'earth-like' planets out there in space. So far we haven't discovered any other life-forms however the universe is a big place, and there could be thousands - perhaps millions of other populations out there !

Answer 3

Because it is the only planet that has air