A Low-Mass Main-Sequence Star's Climb Up the Red Giant Branch

question 47

Multiple Choice

A low-mass main-sequence star's climb up the red giant branch is halted by

• A) the end of hydrogen shell burning.
• B) the beginning of helium fusion in the core.
• C) electron-degeneracy pressure in the core.
• D) instabilities in the star's expanding outer layers.
• E) an explosion that destroys the star.

---

Definitions:

Phonemes

The smallest units of sound in a language that can make a difference in meaning.

Linking Sounds

Linking sounds refers to the phonetic practice where adjacent words are connected smoothly in speech, common in many languages.

Decode

To interpret or translate a coded message or piece of information into a form that is understandable.

Correspondence

communication by exchanging letters, or the relationship between things that are analogous or equivalent in some way.