Which Universe term is correctly associated with classification or identity: “a red dwarf star”, and also with “part of the Alpha Centauri stellar system”?

Correct Answer: Option A — Proxima Centauri. Proxima Centauri is correct because it is a red dwarf star. It is also associated with part of the Alpha Centauri stellar system. Together, these two facts identify Proxima Centauri precisely within Universe. Why the other options are incorrect: Option B — Polaris: Polaris is a Cepheid variable star. It is also associated with located in Ursa Minor, so these facts identify Polaris rather than Proxima Centauri. Option C — Betelgeuse: Betelgeuse is a red supergiant star. It is also associated with located in the constellation Orion, so these facts identify Betelgeuse rather than Proxima Centauri. Option D — Crab Nebula: Crab Nebula is a supernova remnant. It is also associated with located in the constellation Taurus, so these facts identify Crab Nebula rather than Proxima Centauri. Exam Takeaway: Link Proxima Centauri with “a red dwarf star” and “part of the Alpha Centauri stellar system” for quick revision.