What dies a luminosity value actually mean? (not the definition - what does the value itself mean?

Which term best describes the phrase “something that happens”?

What object a collides with object b and bounces back its final momentum is?

What changes occur in the brain during the teenage years? 25 points, someone me out!a.) thinking becomes slower as the brain grows larger. b.) connections between neurons become stronger and faster. c.) unused neurons fuse together to form larger, better functioning neurons. d.) more neurons are developed.