How Do Large-Mass Stars in the Upper Region of the Main

question 39

Multiple Choice

How do large-mass stars in the upper region of the main sequence produce energy?

• A) by fusing hydrogen using the proton-proton chain
• B) by fusing hydrogen using the CNO cycle (carbon-nitrogen-oxygen)
• C) by fusing hydrogen using both the CNO ccle and the proton-proton chain
• D) by fusing hydrogen using the HNO ccle (hydrogen-nitrogen-oxygen)
• E) by fusing helium using the HeNO ccle (helium-nitrogen-oxygen)

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Definitions:

Free-Floating Anxiety

A chronic sense of worry or anxiety that is not directed towards any particular object or situation, often resulting in a persistent feeling of unease or dread.

Generalized Anxiety Disorder

A mental health disorder characterized by persistent and excessive worry about various aspects of one's life.

Phobic Disorder

A psychiatric condition characterized by an excessive and irrational fear of a specific object, situation, or activity.

Generalized Anxiety Disorder

A mental health disorder characterized by persistent and excessive worry about a number of different things, significantly impacting daily functioning.