It is the only planet that supports life. (As far as we know)
mars
It is not unique in any specific physical characteristic; the only thing unique about Earth is that - as far as we know - it's the only planet to harbor life.
Earth is often referred to as the unique planet because it is the only known planet in the universe to have liquid water on its surface, which is essential for life as we know it. Additionally, Earth has a diverse range of ecosystems and abundant biodiversity, making it a truly exceptional and habitable place in the solar system.
it is unique because we can drink from it
Carbon Dioxide do exist in universe in places other than Earth.
The most common unique about earth to other planets is that Earth have life.
The planet Earth is the only planet which we know to contain life. There may be others, but we have not found them yet. So for now, Earth is unique.
Humans can live on it
I live on it! :)
Earth is the only planet currently known to have life.
idsk
It contains a biosphere.
mars
It contains a biosphere.
There are estimated to be around 8.7 million unique species currently alive on Earth today.
It is not unique in any specific physical characteristic; the only thing unique about Earth is that - as far as we know - it's the only planet to harbor life.
What is unique is that it has beings who ask questions starting, 'what is unique about . . . ?'