What were the most important Islamic achievements? Why were the Muslims able to make such great contributions?
How did these contributions impact the world?

Many different cultures have contributed to world civilization, but contributions made by ... and the importance of recognizing the contributions of all of them as a means to ... Medieval Muslim cities were often carefully planned and featured such ... such as Ibn al-Haytham studied optics and made great advances in that field.

Explanation:

the main reason the us senate rejected the treaty of versailles was because "european nations wanted to punish germany"

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