What does this symbol represent in a circuit?
a. cell
b. buzzer
c. capacitor

There is no commonly used circuit symbol that looks just like that.  But there are two symbols that are close.  I guess your drawing could be a slightly incorrect form of either one of them.

I'll show you both of them.

Look at the drawing I attached to this answer.

energy can be converted from one form to another, but it cannot be created or destroyed in ordinary chemical or physical means. do not understand what you are asking but hope this