Q: What chemical element is required for a combustion reaction ?


Read this paragraph and choose the correct option from the provided answers:

A combustion reaction is a reaction in which a substance reacts with oxygen gas, releasing energy in the form of light and heat. Combustion reactions must involve O 2 as one reactant. The combustion of hydrogen gas produces water vapor.

 Choices:

- carbon

- helium

- nitrogen

- oxygen


A:
oxygen