Question

etymological spelling patterns quick check
which fact is true about all words with the root aer? (1 point)
they relate to breathing.
they relate to air.
they will all have the same meaning.
they will all sound the same.

Explanation:

The root "aer" comes from the Greek word "aēr" which means "air". Words with this root, like "aeroplane" (an aircraft that flies through the air) or "aerate" (to expose to air), relate to air. Breathing is more related to the root "pne" (as in "pneumonia" related to the lungs and breathing). Words with the same root don't have the same meaning (e.g., "aerate" and "aeroplane" have different meanings). And they don't sound the same (e.g., "aerate" /ˈeəreɪt/ and "aeroplane" /ˈeərəpleɪn/).

Answer:

They relate to air.