Among all 8 planets, what is the special thing about earth?

There are following special things about earth:

(i) The most special thing about earth is it is the only planet in our solar system where life exists.

(ii) Some special environmental conditions are responsible for the existence and continuation of life on the earth.

(iii) It is just the right distance from the sun so that it has the right temperature range, the presence of water and suitable atmosphere and a blanket of ozone.