Name the process by which new RBCs are produced...explain where this happens...& tell me what other important cells (& important cell fragments) are produced by same process. What are primary functions of these other cells

answer; i believe that the correct answer is (75 to 84 years of age)

for me i have felt invisible when i was clearly struggling,or,i made a great achievement ,and,nobody took to notice me either because they just didn't see it,or,people just turned their back on me.i can see a person being invisible by choice,or,without choice like i did.the people who are invisible by choice don't try to talk to people,don't try to make friends,and,keep to themselves.i haven't been one of those people so i couldn't give you a reason.

hope this and can i get bainliest my dude : d