Answer :
Final answer:
The Sun's lifecycle involves stages of becoming a red giant, forming a planetary nebula, and eventually turning into a white dwarf core.
Explanation:
After the Sun becomes a red giant, it will eventually puff off its outer layers, forming a planetary nebula, and leave behind a white dwarf star at its core.
Once the fuel in the Sun's core runs out, nuclear reactions will cease, and the remaining core will cool down over billions of years.
The Sun's lifecycle will end with it becoming a dark, frozen, and lifeless star, completely changing from its current state as a main sequence star.
Learn more about Sun's lifecycle here:
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