<Li> Arcturus (α Bootis) </Li> <Li> Gacrux (γ Crucis) </Li> <Ul> <Li> Hamal (α Arietis) </Li> <Li> κ Persei </Li> <Li> δ Andromedae </Li> </Ul> <Li> Hamal (α Arietis) </Li>

Explain what causes a dying star to expand to a red giant