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Which trend in the Hertzsprung-Russell diagram indicates stellar evolution?

A. increasing temperature and luminosity
B. decreasing temperature and luminosity
C. increasing temperature and decreasing luminosity
D. decreasing temperature and increasing luminosity

User Btilly
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D) decreasing temperature and increasing luminosity indicates a stellar evolution. This answer based on the axes of the Hertzsprung-Russell Diagram which describe the stellar evolution trend. The X axis in the diagram indicates the decreasing of star's temperature. The Y axis in the diagram indicates the increasing of star's luminosity.
User Narek Mamikonyan
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