Answer:
It is the only planet that has an atmosphere containing 21 percent oxygen.
It is the only planet that has liquid water on its surface.
It is the only planet in the solar system that has life.
The Earth is the only inner planet (Mercury, Venus, Earth and Mars) to have one large satellite, the Moon.
The Earth is unlike every other planet in the Solar System in a number of different ways.
It is the only planet that has an atmosphere containing 21 percent oxygen.
Explanation:
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