Compared to the star it evolved from, a red giant is
A)hotter and brighter.
B)hotter and dimmer.
C)cooler and brighter.
D)the same temperature and brightness.
E)cooler and dimmer.

Question

Quizplus · Accepted Answer

A red giant is cooler than the star it evolved from due to its expanded outer layers, but it is brighter because the surface area has increased significantly, allowing it to emit more light.

Compared to the Star It Evolved From, a Red Giant