OPTIONS:
A). separation.
B). explosion.
C). adding heat.
D). chemical reaction.
E). It remains dormant.
F). wavelengths and photons.
G). uncontrolled.
H). fusion.

Fact 1: Afirecracker converts chemical energy into sound. Fact 2: Chemical energy Energy released as a result of chemical reactions. Given the two facts above, what is happening inside a firecracker as it starts to go off?
Answer:
D).