How Do Low-Mass Stars in the Lower Region of the Main

question 24

Multiple Choice

How do low-mass stars in the lower region of the main sequence produce their 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 cycle and the proton-proton chain
• D) by fusing hydrogen using the HNO cycle (hydrogen-nitrogen-oxygen)
• E) by fusing helium using the HeNO cycle (helium-nitrogen-oxygen)

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