Which of the following sentences uses a coordinating conjunction? A. I tipped my head back and closed my eyes, breathing in the air. B. With a burst of relief, I realized that rain was on its way. C. It reminded me that even the worst times will pass. D. If I wait long enough, relief will come, just like the rain!

A. I tipped my head back and closed my eyes, breathing in the air

Explanation:

A coordinating conjunction is a linking word that joins two elements in a sentence. These can either be verbs, nouns, adjectives, etc. Examples of coordinating conjunctions include: for, and, nor, but, or, yet, etc

Therefore, the sentence that has a coordinating conjunction is option A.

the following key ideas correctly express the key sentence.

restate key idea: most people can learn to swim in ten short lessons.

restate key idea: the majority of water-accident victims require mouth-to-mouth breathing.

restate key idea: an empty, tightly closed gallon jug will support a tired swimmer.  

restate key idea: first aid is to prevent accidents as well as assist in rescue.

explanation: the key idea needs to have the same topic as the key sentence (drowning and safety).

this isnt an english question.