Basically its what the main verb is, so it would be turns because it turns cool and dry.
Answer:
with no context or like the story about the question i cannnot help
Explanation:
C. uses
Uses is the only word that words in this context. The advertisement isn't keeping anything. It hopefully creates a desire in the consumer to buy a product but it doesn't create a technique. It also does intend to convince buyers but it can't intend a technique either. Techniques are used so this is the most accurate and precise replacement for has.
The author uses first person perspective to help create suspense in this passage.
Having the author experience the events along with the narrator creates a sense of calm and happiness at first, lulling the narrator (and the reader) into a sense of comfort. Then, seeing the surprise and the horror of her older face the narrator and the reader discover it together and the mood shifts instantly.