Hey there!
To answer your question, Muscle's are pretty much made of (nutrients) that are stored and compacted that make your body look built and form. But not only this case, (nutrients) help make your muscle look like muscle. Like for example, protein, fruits, veggies, and other nutrients help and improve your muscles.
Your correct answer to this question would be . . . .
[tex]\boxed{\boxed{muscles}} \ is \ made \ of \ boxed \ \boxed{nutrients}[/tex]
Hope this helps.
~Jurgen
