Which characteristic distinguishes Earth from the other terrestrial planets

- - being 93,000,000 miles from the sun;

- - being the most dense;

- - having liquid water;

- - having a dense, transparent atmosphere;

- - having surface temperature and pressure in which

water can exist in all three of its phases;

- - having one and only one moon;

- - having life forms on it;

- - having life forms with the possibility of evolving intelligence;