The presence of which element would indicate that a star is going through a high-mass star life cycle as opposed to a low-mass star life cycle? hydrogen carbon helium iron

Iron

Explanation:

In a high mass star life cycle, there are 5 stages;

Stage 1: hydrogen nuclei combines to form helium

Stage 2: Helium combines to form carbon

Stage 3: carbon used to form heavy metals such as Iron

Stage 4: Supernova explosion

Stage 5: Core of the star collapses

In light mass star life cycle, the core of the star collapses after all the helium combines to form carbon.

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