Which event signals the birth of a star?
A. A core shrinks and explodes in a supernova.
B. A protostar collapses, becoming dense and hot.
C. Extreme heat and pressure causes nuclear fusion.
D. A mass of gas and dust grows and forms a protostar.
Answer (1)
The event that signifies the birth of a star is when extreme heat and pressure cause nuclear fusion. This follows the formation of a protostar from a mass of gas and dust, which eventually leads to star formation. Understanding this process helps clarify the life cycle of stars. ;
