<span>A dim white dwarf star, this is a star with a similar mass to earth. This star has no further fusion reactions at it's core. After this type of star has used up all of it's energy it will become a black dwarf star. Usually they are composed of oxygen and carbon. Sirius a and b are both white dwarf stars that orbit each other.</span>
A random person put the answer for you
I am pretty sure it is B because 'Geo' means rock and 'cronologicly' Means in order of time put it together means the time sequence of rocks
