What we breathe is air, and oxygen is just 20% of the air. Oxygen does not contain water, it is an element and it contains only itself. However, air does contain some water vapor.
yes
These bubbles contain air.
Yes. Porous soil contains more air spaces between the particles, which is needed by burrowing animals such as worms. Water tends to fill these spaces, but even wet soil and sand may contain small air pockets.
vapour
Call your city hall or local water company and complain there is air in your water pipes.
Neither 'contain' air but both can be aerated.
Seltzer water contain carbon dioxide; bubble water may contain and another gases, including air.
Does the air above the sea contain a lot of water vapour or only a little ? Suggest a reason.
Both contain hydrogen and oxygen and there is water vapour in the air.
yes
City because air is like a match with water because the water cycle is first its water then it becomes air then it becomes a little cloud then a tiny riandrop