Please please help me
Which gas is a waster gas?

Question 11 options:

carbon dioxide


oxygen


water vapour


What gas do we need to live?

Question 1 options:

oxygen


carbon dioxide


water vapour
Select all of the correct answers:

What three things happen in the nose to the air?

Question 5 options:

Air gets cleaned.


Air gets drier.


Air gets warmed.


Air gets moister.