Answer:
Complete combustion
Step-by-step explanation:
Let's consider the reaction that occurs when methane reacts with oxygen to produce carbon dioxide and water vapor.
CH₄ + O₂ → CO₂ + H₂O
The reaction between an organic compound with oxygen to form carbon dioxide and water vapor is known as complete combustion. If instead of carbon dioxide, the product were carbon monoxide or carbon, the combustion would be incomplete.