The main sequence star is the star that fuses hydrogen in its core. The element being fused is Hydrogen.
What is a main-sequence star?
The main sequence is a distinct and continuous band of stars.
This sequence fuses hydrogen in its core to produce helium in their core.
Due to the fusion being temperature sensitive, it happens in the central core.
Thus, Hydrogen is being fused in a main-sequence star.
Learn more about the main-sequence star, here:
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