Question

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Explanation:

Analyze Planet A

Planet A is described as an Inner and Outer Planets member (specifically an inner planet) with no moon and hardly any atmosphere. Among the inner planets (Mercury, Venus, Earth, Mars), only Mercury and Venus have no moons. Mercury has almost no atmosphere due to its small size and proximity to the Sun. Therefore, Planet A is Mercury.

Analyze Planet B

Planet B is described as an inner planet with no moon but with a dense atmosphere. Among the inner planets with no moons (Mercury and Venus), Venus is well-known for having an extremely thick, dense atmosphere composed mostly of carbon dioxide. Therefore, Planet B is Venus.

Match the pair

Combining our findings, Planet A is Mercury and Planet B is Venus. This matches the third option: "Mercury and Venus".

Answer:

• Mars and Venus
• Mercury and Earth
• Mercury and Venus (Correct answer)
• Mars and Earth