Answer:
Evelyn's ______ is the practical use of solar power in a vacuum cleaner that is designed to effortlessly vacuum clean the floors of on-the-go and elderly consumers.
A) product idea
B) product concept
C) product image
D) prototype 
E) promotional product 
Answer: B
Explanation: 
Evelyn's product concept from the above was born from thorough research to determine best quality and best performance product for her target market- her on-the-go and elderly consumers. The product concept is a very important concept in marketing that deals with maximizing product features to suite target market, therefore reaching market potential.
 
        
             
        
        
        
The correct option is A.( Lens )
The eye piece is the part of the telescope that one looks through and is the part that makes the focused light visible to the eye. The eye piece is made up of magnifying lenses.
        
             
        
        
        
The question is not clear
        
             
        
        
        
Answer:
dew point
Explanation:
i looked it up but i could be wrong