Question

Which of the following process requires oxygen?

• A. Inspiration
• B. Expiration
• C. Both (A) and (B)
• D. Inspiration and combustion

Answer 1

The correct option is D Inspiration and combustion

We take in oxygen for our survival. This oxygen is used to power all of our life processes. The process of taking in oxygen is called inspiration or inhalation. We wouldn't survive without oxygen for more than 5 minutes!

Oxygen is also essential for the process of setting things on fire. We call it burning. A fancy way of saying it is combustion.

So, oxygen is important for both inspiration and combustion.