Answer:
The type of reaction is shown below is combustion. See the explanation below, please.
Step-by-step explanation:
In the reaction described in the graph corresponds to combustion, where a fuel (alkane: methane, propane, etc.) acts with 02:
Fuel + 02 -> CO2 + H20 + thermal energy
(remember to balance the equation, according to each reaction under the compound used under fuel)