Explanation:
Like most stars in our universe, the Sun is on the main sequence stage of its life. This means nuclear fusion reactions in its core fused hydrogen into helium. However, this process cannot last forever since there is a finite amount of hydrogen in the core of the Sun. Currently it has more than 72% hydrogen.
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The first to do so was Leonardo Da Vinci
D. Substances that are against the law for people of any age to manufacture, possess, buy, or sell
Listen without interrupting the patient. Speak slowly, clearly and loudly. Use short, simple words and sentences. Stick to one topic at a time.