The combustion of wood is an exothermic reaction that releases a lot of energy as heat and light.
(The combustion of wood; is; an exothermic reaction that releases a lot of energy as heat and light) (an exothermic reaction; releases; a lot of energy)
The combustion of wood an exothermic reaction
is releases
an exothermic reaction that releases a lot of energy as heat and light
a lot of energy