Question

Water exists on other planets in the solar system.

Answer 1

Answer:

Life exists only on Earth because water exists as a Liquid on Earth.            

Explanation:

For life to exist, liquid state of water is very important. 70% of the Earth is covered by water majority of which is in liquid state. Water does exist on other planets and moons in the solar system but in other forms. for life to exist even in the smallest form, liquid water would be required to exist and for this, the body must lie in a zone where temperature is moderate that is neither too hot nor too cold.

Answer 2

Liquid.

Earth can sustain life because it contains liquid water.