Answer:
what is the question I will help you I'm comments
Guys are different from girls because you guys shut down and dont communicate with anyone about your problems..Girls actually sit down and communicate..you guys like to build stress upon yourself..us girls doesnt believe in holding stress
Answer:
nuclear fusion
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.
