One requirement for natural selection would be the variation or differences of heritable traits being observed in a select group of organisms, allowing for better adaptability and ultimately survival of the said group or category of organisms.
About 90 percent of the stars in the universe, including the sun, are main sequence stars. These stars can range from about a tenth of the mass of the sun to up to 200 times as massive. <span> But if the body has sufficient mass, the collapsing gas and dust burns hotter, eventually reaching temperatures sufficient to fuse hydrogen into helium. </span><span>All main sequence stars (including the Sun) are powered by the fusion of hydrogen (H) into helium (He). Fusion of hydrogen requires temperatures of more than </span>10 million Kelvin<span>.</span>
It makes a baby
hope i could help