What do blind people who were born blind see?

Do they just stay watching nothing? Like when we close our eyes and see nothing but the colour black? Or white? How do they read by touching the letters if they've never seen them before? Why do they hear everything so well?!! Even when your steps on the floor that you can't hear!! Do they ever know how they look like?? Do they ever know what colours are?? Or how a human's body is?? And when they sleep, don't they ever dream? If so, what do they dream about if they don't even know how things look like??? How do they know if the room they're in is dark or not??
Tnx 4 answering if you will or did! Lol

I dont have all the answers, but to your reading question, remember that letters and words in themselves hold no meaning... it is because we ascribe meaning to the shape and combination of the letters that they make sense and communicate something... so people who are blind ascribe meaning to those particular shapes... (it's like how deaf people have sign language, those signs mean words, even if they've never heard the words being spoken)

They hear so well because your body and brain adapt to compensate for the loss of one of the senses. It is a defense mechanism, they need to hear especially well to protect themselves...

I dont think they know what colors are

What do you mean how a human body is - they can feel it, so they have an idea of it's shape and texture, but probably not what it looks like

Everyone dreams, but you dream according to what the world is like to you, you see images, I'm sure their dreams are more filled with sounds and textures...

Well I guess they wouldnt know if a room was dark or not? Although they might know by an increase in temp (like if it's daytime, the sun's out, it gets hotter)

as there blind, they cant see anything unles there partly blind, they dream an have images in there head of what things and people look like as people describe things to them,and becuase they have lost there site or been born with no site there other sences are more alert, and they read by using brail wich is a number of dots used 2 make up letters, words and numbers.Obviously there going to know what colours are because they would have learnt about them but I dont actualy think they know what the actual colour is if you know what I mean? and im guessing they do dream, everybody dreams, people can descibe to theblind of what things look like an im guessin they dream by having images in there head of what cartain things look like I dont think they could tell if a room is dark or not, as if there fully blind they wont b able 2 c anything at all

he see things due to imagination's.. as you alway's imagine how heaven is