As an interstellar cloud collapses to become a star,its central region eventually becomes opaque.Why is this a significant development in the formation of the star?

Question

Quizplus · Accepted Answer

The opacity of the central region allows for the temperature to rise, which is a significant development in the formation of the star. This is because the increased temperature will trigger nuclear fusion, the process in which hydrogen atoms combine to form helium, which will release a tremendous amount of energy and create a stable star.

As an Interstellar Cloud Collapses to Become a Star,its Central