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)

Question

Quizplus · Accepted Answer

Low-mass stars in the lower region of the main sequence, such as our Sun, produce their energy by fusing hydrogen using the proton-proton chain. This process combines hydrogen nuclei (protons) to form helium in a series of steps, releasing energy in the form of gamma rays at each step.

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