What best contributes to clear writing?

Active sentence construction. You never want o repeat vocabulary or subjects, or your writing will become boring. Always use complete sentences including a strong subject and predicate. State your point with logic and good explaination. If it is an essay, be sure to state all reasons with large enough paragraphs to get the point across. If your sentences are too complex it could result in straying away from the actual point or even run/ on sentences which are never good in important essays or business letters. Impressive complex vocabulary is good. Also, yes, it does streghten the content of the writing but too much or too little could potentially confuse your readers or even yourself if you use the words incorrectly.

There are two theme's to "The Gift of the Magi" one being Love and the other being Sacrifice. "The Gift of the Magi" gives it's lesson by showing that even in rough times there is still some "Love" in everyone's hearts.

By having the setting at Christmas time it shows the comparison to the men's gifts to Jesus.

Here is something to work off of because i am guessing you did not read it and are hoping for someone to do it for you.

Actually read it if you want a good grade.