Why wouldn’t the water cycle constantly adds pollution to the air be important in the water cycle

This wouldn't be important because the water cycle is simply a series of events that occur starting from Evaporation, condensation, sublimation, precipitation, transpiration, run off, and lastly infiltration. Though you may think that through a certain step the water is adding pollution to the air, this is not something that is being examined or asked of you to identify when specifically dealing with the water cycle alone. Hope that answers your question.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.