Hydrogen is the main element that stars are made of. Thus, the correct option is B.
What are Stars?
Stars may be defined as large celestial bodies formed mostly of hydrogen and helium that construct light and heat from the whipping nuclear forges inside their cores.
Stars mostly consist of very hot and light gases. Such property is only fulfilled by gases like hydrogen and helium. These two elements are the lightest ones.
The phenomenon of the shining of stars involves the burning of hydrogen into helium in their cores. The presence of hydrogen in stars is approximately 70% by mass.
Therefore, Hydrogen is the main element that stars are made of. Thus, the correct option is B.
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