Answer:
Option A is correct.
Explanation:
At the temperature [tex]10^{7}K[/tex] the hydrogen atoms fuse to form helium thus a large amount of heat is produced and stars are formed.
Due to gravitational pull the particles and the molecules of gases become condense and by which it becomes hot. The process goes unless the temperature of the core becomes 10,000,000K.
At this temperature, the fusion takes place and energy is released.
Thus the star shines.
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