<u>The right answer is</u>
Activists have coined the slogan “toilet to tap” to discourage the use of wastewater.
<u>Explanation</u>
<em>Toilet-to-tap or direct potable reuse is the future of potable water wherever we have acute water shortages but we still have a perception issue to resolve.</em>
 
        
                    
             
        
        
        
Answer: B. We can make a lot of money from this retail  opportunity.
Explanation:
Even though retail means to sell something, it is not a general substitute for the word sell. Retail refers to the act of selling or engaging in a business opportunity that requires some form of sales. 
When used in a sentence, it should relate to that act rather than be used as a substitute for ''sell''. For instance, ''Jack engaged in retail by selling the cow''. Retail should refer to or describe the action - which is why it is an adjective -instead of being the action word   as is the case in option 2.
 
        
             
        
        
        
I believe the term is Syntax.
        
                    
             
        
        
        
It depends on the situation...were they kicked out or did they willingly move out?
If they are kicked out then they are then homeless, but if they willingly moved out and moved into another place, they just simply moved. 
Not sure if that is the answer you were looking for, but that's all I can give you unless you provide more details to your question. Hope it helped! :)