The B class main sequence star from the given images is Star 3.
What are B class main sequence stars?
B class main-sequence stars are of spectral type B and luminosity class V. They are very luminous and blue with surface temperatures between 10,000 and 30,000 K.
The stars that are blue as shown in the image are Star 1 and Star 3. However, Star is the one that has surface temperature between 10,000 and 30,000 K.
Therefore, Star 3 is a B class main sequence star.
In conclusion, stars are luminous objects with very high surface temperatures.
Learn more about main sequence stars at: https://brainly.com/question/2658702
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