Question

Why life is possible only on earth?

Answer 1

Conditions on Earth
Water.
Temperature. Most of the planet is above 0°C, so water in organisms does not freeze. ...
Gases. The appropriate mix of gases are needed such as CO₂for photosynthesis, oxygen for respiration and nitrogen for protein synthesis.
Light and solar radiation.

Answer 2

because earth is unique planet it is at correct distance from sun and neither it is too hot nor it is cold . it is the planet which has water and there are many reasons . atmosphere is one of the reason .