Which organ prepares undigested materials for elimination from the body

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.

The air that we breath is made mostly of which gaseous molecule

Write a full page that sumerizes thermodynamics it’s from the website visionlearnig