Question

.. why life exists on the earth but not on the planets
me earth but not on the planets such as Venus and Mars​

Answer 1

Life exist on earth because in earth the temperature is ideal for life and the only planet in the solar system that had water and oxygen that promote life.

But in planets like mars or venus no water is available and the average temperature is too hot not suitable for lifestock.

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Answer 2

Answer:

because earth have oxygen and water and favourable conditions for human requirement and other planet does not support all these thing that's why life exist on earth