Answer:
D.
Explanation:
All of these
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Tough cuticle made of proteins and chitin. 
        
                    
             
        
        
        
Answer:
The correct answer is Jenga blocks. 
Explanation:
A toy, which appears like the composition of a muscle is the Jenga blocks. In case if a piece is tried to be moved it disrupts the pieces that are present close to it, as well as the entire game. This may associate the muscles, which are tight by an individual, similarly to the game, the tight muscles can be associated with the overall stability of the individual.