By talking
Speech, touch
Time
they can still hear you, so speaking works. as far as reading goes, if the blind person has learned brail then you can communicate that way too.
A blind axle is an axle which turns but does not communicate motion.
No, lions are not color blind. They have color vision similar to humans, which includes the ability to see a range of colors. Lions use their color vision to distinguish prey and to communicate with other members of their pride.
Helen Keller was deaf and blind but not dumb. While she did lose her ability to see and hear at a young age, Keller was able to learn to communicate effectively through tactile sign language and eventually became a prominent author and political activist.
mental ability is when someone can't do something because they are def, blind, in a wheel chair, broke an arm, any kind of injury
Yes, very much in the same way that non-blind people can communicate with music. (Assuming they're not also deaf.)
Yes, the ability to communicate with fellow workers and customers is a requirement. Not being able to communicate is certainly a valid reason for not hiring someone.
What skills are required to develop overall ability to communicate
Because they can't see you
Some lasers have the ability to make you blind.