Question

our closest visible star is *
○ alpha centauri
○ proximi centauri
○ twinkle twinkle
● the sun

if a galaxy has a greater red shift than another...... *
● it is moving faster
○ it is moving slower
○ it is no longer on the main sequence of an h - r diagram
○ it is turning into a black hole

Explanation:

First Question:

The Sun is the star at the center of our solar system and is the closest visible star to Earth. Alpha Centauri and Proxima Centauri are farther, and "twinkle twinkle" is not a star.

Redshift in galaxies is related to the Doppler effect and the expansion of the universe. A greater redshift means the galaxy is moving away from us faster (Hubble's law: velocity is proportional to redshift). The other options are incorrect: slower movement would mean less redshift, HR diagram relates to stars, and redshift doesn't imply turning into a black hole.

Answer:

D. the Sun

Second Question: