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Correct Answer: Option A — Mars. Mars is correct because it is a terrestrial planet. Mars is also associated with the fourth planet from the Sun. A further identifying fact is that Mars is known as the Red Planet because of iron oxides. Another useful fact is that Mars is associated with Olympus Mons is located on it. Why the other options are incorrect: Option B — Jupiter: It is a gas giant and is associated with the fifth planet from the Sun; those are the identifying facts of Jupiter. Option C — Saturn: It is a gas giant and is associated with the sixth planet from the Sun; those are the identifying facts of Saturn. Option D — Uranus: It is an ice giant and is associated with the seventh planet from the Sun; those are the identifying facts of Uranus. Exam Takeaway: Link Mars with “a terrestrial planet” and “the fourth planet from the Sun” for quick revision.
