What can you infer about water in the air?
Water in the air contains contaminates.
Water in the air does not have contaminates.
Water in the air is very large.
Water in the air is very salty.

I believe water in the air contain contaminates c:

Explanation:

Heat from the Sun causes water to evaporate from the surface of lakes and oceans. This turns the liquid water into water vapor in the atmosphere. Plants, too, help water get into the atmosphere through a process called transpiration! ... Water can also get into the atmosphere from snow and ice.

oxygen +1 most likely

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.