Uses of Radio Waves : The prime purpose of radio is to convey information from one place to another through the intervening media (i.e., air, space, nonconducting materials) without wires. Besides being used for transmitting sound and television signals, radio is used for the transmission of data in coded form.
 
        
             
        
        
        
CTRL+B when you hover your mouse over it on powerpoint it comes up saying that
        
                    
             
        
        
        
Answer:
the answer is A, B, C hope this helps.
 
        
             
        
        
        
Where does the book icon of the Help file take you?
 ans To a section to browse Help by category. 
is answer hope you like it
"c"is correct