Free Points why do i always slightly feel empty, stressed, like im not worth it, and maybe even slightly depressed always in the back of my mind no matter what even though i literally have no reason whatsoever to? why cant i just be completely happy?

Well man your slightly empty cause you don't do much for yourself. your stressed cause your not sleeping at night and your depressed because without sleep your left with little energy to be happy and to tired cause you have to do a lot everyday.

Explanation:

you need some sleep get some rest do things that make you happy take some time off from your work or responsibilities for yourself. Only then can you fell happy. I hope you take this message into heart and have an amazing rest of your day.

b and c would be the answers

answer(b) keep oxygenated and deoxygenated blood separate;