4. Which might change, depending on the distance to a star?
A. absolute magnitude
B. apparent magnitude
C. composition
D. luminosity

B. Apparent magnitude

Explanation:

Apparent magnitude.

Explanation: The absolute magnitude scale is how the luminosity (or true brightness) is measured. The luminosity depends on the temperature, size, spectra. The apparent magnitude is the brightness of the star as it appears from Earth.

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.