Amental change accociated with young adulthood is

A mental change is the ability to think ahead, but not just the consequences but thinking far ahead on how things can effect the future.

It is very important to stay hydrated. your body needs it for may things for cells, tissues, your organs and etc. water also with your temperature that way you don’t get a headache etc. i bet if you look it up there will be a lot of things you can learn.