Answer:
D. decomposition
Explanation:
Synthesis reaction occurs when two elements or compounds react to originate a new one:
A + B ⇒ C
Combustion occurs when a fuel reacts with oxygen to form CO₂ and water:
A + O₂ ⇒ CO₂ + H₂O
Replacement reaction can be simple or double. Simple occurs when a simple element replaces others in a compound:
A + BC ⇒ B + AC
Double occurs when two compounds replace elements between them:
AB + CD ⇒ AC + BD
Decomposition reaction occurs when a compound originates two or more compounds
A ⇒ B + C
So, the reaction given is a decomposition chemical reaction.
