Concept:Use set relationships from given statements to check each conclusion.
Explanation:Given: All planets are moons, so planets are a subset of moons.
Given: All moons are stars, so moons are a subset of stars.
Thus, planets are a subset of stars (transitive property).
Conclusion I: All moons are planets. This is the converse of the first statement, which is not necessarily true (moons could be larger than planets). So I does not follow.
Conclusion II: All planets are stars. This directly follows from the chain. So II follows.
Hence, only conclusion II follows.
Answer:Only conclusion II follows.