Which event signals the birth of a star?
![Which event signals the birth of a star class=](https://us-static.z-dn.net/files/d13/9f111d78649153b69bd861d99b25d06c.png)
Answer:
Its c.
Explanation:
When the density and temperature at the core of the gravitationally collapsing nebula reaches values when nuclear fusion is triggered and sustained, that marks the birth of the star.