1. Meaningful parts means words that make sense; words you can understand. Flagpole would become flag and pole.
2. What does flag mean? A piece of cloth, usually rectangular, of distinctive color and design, used as a symbol, standard, signal, or emblem. What does pole mean? A long, cylindrical, often slender piece of wood, metal, etc.
3. A symbolic cloth on a pole, or meant to be on a pole, would be called flagpole.
4. Use these steps and summarize them in your own words.
Hope this helps!
The correct answer is academic.
Argumentative essays require you to use extensive research so that you can make your arguments stronger. You will usually present the argument you are fighting against, and the arguments that you want to support, and therefore you need to convince the reader to believe you. You will do that by using academic style and vocabulary, rather than friendly, informal, or personal.