Answer: C. The Sun's luminosity is average, and it has the greatest apparent brightness
Explanation:
Answer: Multiple populations in a given area
Fireworks twinkle bright colors when gunpowder and "stars" reacts with oxygen. (These stars hold fuel, an oxidizing agent, a binder and metal salts or metal oxides) [This information is found at https://www.livescience.com/32675-how-do-fireworks-get-their-colors.html if you'd like to go read more] :)
I don’t know sorry, I hope the person above me is correct. If they’re not sorry I can’t help :(