Because, when an infection exist in the human body it tends to spread, so if the cells stayed in one space then the infection would have a much greater opportunity to severly make that person very ill before the cells could even get to the infection.
It means that they are near sighted. I know this because I am also near sighted. Which makes it hard for me to read road signs from a far away distance sometimes. Hope this helps!!!
I think that it is Lung cancer that is mainly caused by tobacco
Answer:
about 120 mph so about 2mps so 4mps
Explanation: