The main idea in the above paragraph is that D.) Different Societies have different ideas about the purpose of marriage.
American society marry because the couple romantically love each other.
Other society marry for economic purposes. Still other society marry to retain the pureness of the lineage, to secure the family wealth within its grasp, and to further amass power and privileges.
Short story with 5 prepositional phrases -_-
Introductory Sentence: This is the first sentence of the body paragraph. It should inform your readers of what you will be talking about in that passage. Make sure to keep it brief. An example of an introductory sentence is, "For holidays, my family sets up the decorations, cooks a meal, and invites all of the relatives over."
Supporting Sentences: These should support your introductory sentence. If you're talking about a holiday celebration, you may want to describe any traditions you have. (There are usually around 5 supporting sentences in each body paragraph.)
Concluding Sentence: This sentence should sum of the main idea of the paragraph and hint at what will be coming in the next passage so you can make a smooth transition.
There are three basic components of speech. The first part is the introduction which includes background material to build credibility. Next is the main points and transitions which are the actual body of the speech. Lastly is the conclusion where you emphasize, summarize and restate relevance of introduction with the conclusion.