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 produce their energy primarily through the proton-proton chain reaction. This process is the dominant energy source in stars with masses similar to or less than the Sun, as it requires lower temperatures and pressures compared to the CNO cycle.

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