How does the habitable zone around a star of spectral type G compare to that around a star of spectral type M?

A) It is larger.


B) It is hotter.


C) It is closer to its star.|||A is the correct answer. M-type stars are cooler than is the Sun, which is a G-type. So, a habitable zone around an M-type star would be closer to the surface of the M-type star, so C is not correct . A closer distance would mean a smaller habitable zone in general (for the M-class). If the M-type star is a giant then, of course, the zone could be larger, but that's a special case.|||A G star is hotter and larger than an M star, so its habitable zone will be larger.|||A