One good way of making use of an idiom in a sentence is:
The talk given to use by the principal did a lot to lift the spirits of the students.
The idiomatic phrase "lift the spirits" shows that a person who was previously sad or depressed had that mood changed and is now much happier than before.
With this in mind, we can see that this shows that words, encouragements, rewards, etc can help to lift the spirit of a person in any situation.
I believe A would be the best answer. In the question, it states that Shawn has trouble understanding the ideas. So, rephrasing the ideas in his own words would help. I hope this helped u!
A good paragraph is composed of a topic sentence , relevant supporting sentences, and a closing sentence. This structure is key to keeping your paragraph focused on the main idea and creating a clear one