Answer:
The invention that propelled the spread of learning throughout the Islamic world is Paper.
This invention helped them to write.
Explanation:
Islam: Empire of Faith is a broadcasted series, that came out in 2000 and picturized the details of Islamic empire, from birth of Muhammad to the rise of Ottoman Empire.
In this series, the invention which is considered to be the invention that contributed in the spread of learning throughout the Islamic world is the invention of paper. When Islam conquered Central Asia, they came in proximity with paper. They learned how to make papers and soon became the most used and sold products in all parts of the society, from government to citizens.
This invention was effective in a way that it helped people to write. Paper became an important product as it helped to secured documents from being forged or erased. In the middle of the ninth century paper was widely used hundreds of Paper factories were built in Baghdad.
Thirteen Colonies” is shorthand for the English-speaking colonies arrayed along the east coast of North America, which rebelled against Britain in 1775-83.
i don't understand what you're saying
I think it happened because president Hayes had a bad reputation at that time and the idea was, the congress should be stronger to "look at his hands".