The Life cycle of stars
Birth:-
The birth of stars take place in beautiful big cloud of gas called as nebula. When significant amount of gas come together due to gravity the core of star is formed and it starts taking up matter around it and a protostar (baby star) is formed. As it takes matter it starts becoming bigger with time but there is also a limit to become bigger. When the star come its maximum size of its limit it stops taking matter and it starts using its own fuel (hydrogen).
Your explanation of birth of star is very good
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