4. Elements that lie along the stair step line of the periodic table are
a. metals
c. liquids
b. metalloids
d. radioactive

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.