Final answer:
Combustion is usually associated with oxidation, but there are exceptions depending on the conditions and substances involved.
Step-by-step explanation:
Combustion is a type of oxidation reaction in which a substance combines with oxygen to produce heat and light. However, there are certain cases where combustion does not involve oxidation. For example, in the absence of oxygen, certain substances can undergo anaerobic combustion, such as fermentation.
In addition, there are cases where combustion can involve other elements besides oxygen. For instance, in aquatic environments, some organisms undergo combustion with other oxidizing agents like chlorine or bromine, instead of oxygen. So, while combustion is typically associated with oxidation, there are exceptions depending on the specific conditions and substances involved.
Learn more about Combustion and oxidation