Question

question 3
the unusually bright centers found in some (very distant) galaxies are called
type ii supernova explosions
active galactic nuclei
starbursts
exceptionally bright pinwheel galaxies

Explanation:

Active galactic nuclei are extremely luminous regions at the centers of some galaxies, powered by super - massive black holes accreting matter. Type II supernovae are stellar explosions, starbursts are regions of intense star formation, and pinwheel galaxies are a type of spiral galaxy, not related to bright galactic centers in this context.

Answer:

B. active galactic nuclei