Concerto-a solo instrument joined by a concert. Sonata-a solo instrument. Symphony- a piece of music scored for a full orchestra. 
        
             
        
        
        
This is probably a joke but I'll answer anyway 
By 'cheeks' they mean buttocks so by "making them clap" is referring to them being so big/thick that they clap or make noise when you walk or move around or something. 
I probably got played lol but whatever 
 
        
             
        
        
        
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As an Artist I think it depends on which piece of art it is and how you feel. Personally I like charcoal. On art medium they don't really talk about is oil paintings. They don't like teaching it because it a more complex medium.They mainly focus on acrylic paintings.
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