Explanation:
form an idea of the amount or number evaluation means
The key motive for many of harry potter's actions were because of the saying "neither can live while the other survives"
<span>D. Washington's bravery</span>
Most likely: "A midwinter vacation at Club Tropic has its good points and bad points".
It sums up the basic points of the paragraph, and introduces the subject in a more or less general way. And by placing it at the beginning of the paragraph, and reading it out loud or in your head you can see/hear how it suits it.