Approximately 70% of the Sun is composed of __________?
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Answer: B. Hydrogen
Explanation
Hydrogen makes up approximately seventy percent of the total mass composition of the Sun. Nuclear fusion reactions in the solar core convert hydrogen into helium continuously. Spectroscopic analysis confirms that hydrogen is by far the most abundant element within the Sun. The Sun is a massive yellow dwarf star located at the very center of our solar system. Helium accounts for most of the remaining percentage of the Sun's elemental composition. Stars generate immense light and heat energy through the process of stellar nucleosynthesis.
Astrophysicists study stellar composition to understand how stars form, evolve, and eventually die. Solar energy drives weather systems and sustains all biological life on planet Earth. Physics curricula use the Sun as a primary example to explain nuclear fusion and plasma dynamics. Oxygen is present in trace amounts in stars but does not form their primary mass. Helium makes up about twenty-seven percent of the Sun which is significant but secondary to hydrogen. None of these is incorrect since hydrogen is accurately identified as the primary solar element.
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