Billy expands when his fuel starts to run out. He isn't as hot on the surface anymore, which makes him red, and he is many times larger
than he used to be. He is now called a red giant.
What does Billy do now? (Billy has 1 stellar mass.)
expands even more
contracts to form a white dwarf
has a supernova

Acm ruler with main graduations from 1 to 10 from left to right there are 10 secondary graduations between each of the main graduations there is a line that begins. at the left end of the ruler 10 secondary graduations to the left of the “1 main graduation the right end of the line ends on the eighth secondary graduation to the right of 3 how long is the line