professional communication

Answer the following questions, providing detailed explanations and specific examples with each response (at least 7 sentences for each number). 

1. What should you do if some members of an audiences dont know the meaning of a term you are using, but other members of the audience do? 
2. Why is it important to relate a speech to the listeners self-interests? 
3. How could each of the following topics be presented in a way that would satisfy a listeners attitude of Whats in it for me? a. Rain forest destruction b. Security surveillance of employees c. Solar energy d. Homeless people