Question

Which of the following is the reason for living things to respire?

• A. To continue living
• B. To receive oxygen for body
• C. To expel carbon dioxide from body
• D. All of the above

Answer 1

The correct option is D All of the above

1. Respiration is the process of break down of a complex molecule into a simpler form to obtain energy for the continuation of life.
2. It requires oxygen to carry out the process.
3. It is also necessary to remove the waste material from the body release by a process like carbon dioxide.

So the correct option is 'All of the above'