The answer choice which best illustrates that the underlined sentence develops the central idea is; it shows that a muslim invention benefited european society.
<h3>Which best develops the central idea?</h3>
The passage in discuss reads thus;
<u>But the Crusades were more than battles; they were also an information exchange.</u> As a result of their contact with Muslims, the Europeans began to break out of their sealed-off world. They learned mathematics and, according to some scholars, how to build windmills. Windmills were a great power source that allowed Europeans to drain swamps and make use of lands that had previously gone to waste. With more land, they could grow more food. This knowledge that Muslims had helped Europe to get on its feet. And wars against the Muslims brought Europeans to sugar.
It therefore follows from the underlined sentence that there were negative and positive results from alliance.
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Waverly's mother is a very proud and strong woman who tries to achieve recongnition through her dauther's accomplishments in chess and when Waverly gains national recognition her mother starts making Waverly's victories hers.
There is nothing wrong with a mother being proud of her daugther's triumphs, but in the case of Waverly her mother became obsessed with her daugther at the point of trying to live her life through Waverly. And the worring part is that all this was covered under the mask of love, Waverly's mother never meant any harm for her daughter, all the damaged she caused was disguised by love, and this is where the phrase "A parent’s love can be described as a double-edged sword, having the power to both defend and destroy a child" becomes valid, sometimes love can do more damage because when you see it you can not protect yourself, it is love in the end.
My best guess for this question is to find good topic to talk about, and if your topic is too broad it may be hard to find information. So if your topic is too broad you have to do a lot of research, and find information that you thought made sense.