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 :)
        
             
        
        
        
Answer:

Explanation:
In an effective speech the speaker <u><em>clearly introduces the topic</em></u>
[ Spends little time developing the topic ] This answer is incorrect.
In order to ensure a clear and strong speech, taking time to develop and create a valid topic is vital. This ensures that the audience will understand and clearly follow your speech. The topic also provides the barriers and grounds for your speech.
[ States main ideas but does not support them with details ] Evidence and details are needed in ensuring a valid speech. Main ideas are just ideas to the wind without backup, evidence and details. Main ideas hook to the topic, but details hook to the main idea.
[ Allows the listener to come up with his or her own conclusion ] This is not a debate. When giving a speech, this is your time, and when it is your time this is when you give your ideas and your topic. Sometimes you can engage with your audience, but you are not to allow them to give your speech for you.  
 
        
             
        
        
        
Answer:
B and D but u have to choose one so i would say B
Explanation:
B. The reader your writing it for
 
        
             
        
        
        
Answer:
People call it the river of destruction.
Explanation:
When the subject is the performer of the action of the verb, it is called the active voice.
When the subject receives the action of the verb, it is called passive voice.
The given sentence is a sentence in passive voice. The subject in the sentence is unknown. When it is changed to the active voice, the general subject 'people' is added to it. The 'by-phrase' is missing in the sentence written in passive voice. The subject is the receiver of the action. The action of calling is done by the people. 
 
        
             
        
        
        
Hmmmm I would put B as my answer.
-Gives you thumbs up-