One barrier in communication is being deaf (hard of hearing). This can cause many difficulties in communication due to people not hearing you. Although to overcome this barrier we can learn ASL (American sign language) to speak to each other in another language using our hands.
This is just an example but the main focus is dead and ASL to overcome hope this helps :)
The author would pay attention to small details because some small details are very important.
the third one down is all on u
i would help her learn sign language or something that she could use to be able to "speak" to others.
idk about the first one because it's been awhile since i had read the book
The area is length times width so if it is a square then you would take nine times nine leaving you with 108.