Question

while researching a topic, a student has taken the following notes: stars form in a galaxy when gravity causes a massive cloud of dust and gas to collapse. a galaxy in a phase of rapid star formation is called a starburst galaxy. quenching is a process in which a galaxy loses star - forming gas. a galaxy that no longer forms stars is called a quenched galaxy. a quenched galaxy has entered the poststarburst phase. the student wants to explain what a quenched galaxy is. which choice most effectively uses relevant information from the notes to accomplish this goal? choose 1 answer: a before quenching, a starburst galaxy will form stars at a rapid rate. b when it becomes quenched, a starburst galaxy enters the poststarburst phase. c having entered the poststarburst phase, a quenched galaxy is one that no longer forms stars. d a starburst galaxy will lose star - forming gas and eventually become quenched.

Explanation:

The question asks to explain what a quenched galaxy is. Option C directly defines a quenched galaxy as one that has entered the post - starburst phase and no longer forms stars, using key information from the notes. Option A focuses on starburst galaxies before quenching, Option B just mentions the phase transition of starburst galaxies when quenched, and Option D describes the process of a starburst galaxy becoming quenched rather than directly defining a quenched galaxy.

Answer:

C. Having entered the poststarburst phase, a quenched galaxy is one that no longer forms stars.