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Correct Answer: Option D — Earth. Earth is correct because it is the Moon is its only natural satellite. Earth is also associated with a terrestrial planet. A further identifying fact is that Earth is liquid surface water supports known life. Another useful fact is that Earth is associated with the Moon is its only natural satellite. Why the other options are incorrect: Option A — Mars: It is Olympus Mons is located on it and is associated with a terrestrial planet; those are the identifying facts of Mars. Option B — Jupiter: It is the Great Red Spot is a giant storm on it and is associated with a gas giant; those are the identifying facts of Jupiter. Option C — Saturn: It is its average density is lower than water and is associated with a gas giant; those are the identifying facts of Saturn. Exam Takeaway: Link Earth with “the Moon is its only natural satellite” and “a terrestrial planet” for quick revision.
