Which Universe term is correctly associated with important feature: “the photosphere is its visible surface”, and also with “sunlight reaches Earth in about 8 minutes 20 seconds”?

Correct Answer: Option C — Sun. Sun is correct because it is the photosphere is its visible surface. It is also associated with sunlight reaches Earth in about 8 minutes 20 seconds. Together, these two facts identify Sun precisely within Universe. Why the other options are incorrect: Option A — Sirius: Sirius is the brightest star in Earth's night sky. It is also associated with it is about 8.6 light-years from Earth, so these facts identify Sirius rather than Sun. Option B — Proxima Centauri: Proxima Centauri is the nearest known star to the Sun. It is also associated with it is about 4.24 light-years away, so these facts identify Proxima Centauri rather than Sun. Option D — Polaris: Polaris is commonly called the North Star. It is also associated with it lies close to the north celestial pole, so these facts identify Polaris rather than Sun. Exam Takeaway: Link Sun with “the photosphere is its visible surface” and “sunlight reaches Earth in about 8 minutes 20 seconds” for quick revision.