Question: where does nuclear fusion happen in a star

title: Nuclear fusion
text: ( 1 ) + → He ( 3.5 MeV ) + n ( 14.1 MeV ) ( 2i ) + → ( 1.01 MeV ) + p ( 3.02 MeV ) 50 % ( 2ii ) → He ( 0.82 MeV ) + n ( 2.45 MeV ) 50 % ( 3 ) + He → He ( 3.6 MeV ) + p ( 14.7 MeV ) ( 4 ) + → He + 2 n + 11.3 MeV ( 5 ) He + He → He + 2 p + 12.9 MeV ( 6i ) He + → He + p + n + 12.1 MeV 57 % ( 6ii ) → He ( 4.8 MeV ) + ( 9.5 MeV ) 43 % ( 7i ) + Li → 2 He + 22.4 MeV ( 7ii ) → He + He + n + 2.56 MeV ( 7iii ) → Li + p + 5.0 MeV ( 7iv ) → Be + n + 3.4 MeV ( 8 ) p + Li → He ( 1.7 MeV ) + He ( 2.3 MeV ) ( 9 ) He + Li → 2 He + p + 16.9 MeV ( 10 ) p + → 3 He + 8.7 MeV