One of the most important steps for a successful research is using quality sources. It is necessary to use different sources that have identical theme to your research.
So the first thing a student should do after he has gotten different sources that can be used for his research is to determine the key ideas from each of his source and after doing that, implement those ideas into his research while using other samples to make a great research work.
when you are researching you have to look at multiple sources and combine all of it so if you are going to do that instead of rewriting the whole website, they can just determine what the key elements are and go from there
The Great Wall of China helped China because it protected them from attacks. This helped them feel more secure because they didn't want any foreigners to ever rule them again (the Mongols were the foreigner that previously ruled them).