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Red Giants: The Expanding Embers of Stellar Evolution
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What is the primary mechanism responsible for the expansion of a red giant star?
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A
Decreased gravitational pull from the core
💡 Explanation:
As a star evolves into a red giant, its core undergoes significant changes. The core contracts and becomes denser, leading to a decrease in the gravitational pull from the core. This decrease in gravitational pull allows the outer layers of the star to expand, resulting in the characteristic red giant structure.