When comparing the size of our Sun to other stars, we must consider the vast range of star sizes in the universe. Stars can be categorized by size into several groups: dwarf stars, which include red dwarfs, white dwarfs (which are the remnants of stars like our Sun, but much smaller after having shed their outer layers), and brown dwarfs (which are sometimes considered sub-stellar objects); average stars, which include our Sun; and giant stars, which include red giants and supergiants, among the largest in the universe.
The Sun is a main-sequence star (specifically, a G-type main-sequence star or G-dwarf), and it's in the middle range of star sizes. It's neither particularly small nor exceptionally large. Based on observations and comparisons, the Sun is classified as an average-sized star. Therefore, the correct response from the provided choices is B: average.
