How does nuclear fusion create new elements inside stars?

Once the fusion reactions begin, they exert an outward pressure. As long as the inward force of gravity and the outward force generated by the fusion reactions are equal, the star remains stable.First, stars fuse hydrogen atoms into helium. Helium atoms then fuse to create beryllium, and so on, until fusion in the star's core has created every element up to iron.

because the center-south is called the heart of the country

what events in mexico's history might explain why the country continues to have difficulty improving social justice and economic opportunities for all people?