The flame of the candle is the spontaneous chemical reaction that is giving off energy (the light and heat).
(The flame of the candle; is; the spontaneous chemical reaction that is giving off energy (the light and heat)) (the spontaneous chemical reaction; is giving off; energy)
The flame of the candle the spontaneous chemical reaction
is is giving off
the spontaneous chemical reaction that is giving off energy (the light and heat)
energy