Answer:
He wanted to unify and subjugate all the states like Han, Zhao, Wei, Chu, Yan and Qi by the powerful political, economic and military strength of the Qin State. Ying Zheng realized his ambition and built the first feudal and centralized empire in Chinese history in 221 BC.
Shi Huangdi determined to close the gaps and extend the wall almost the length of the empire's border. Enemies would have to gallop halfway to Tibet to get around it. The Great Wall of China arose on the backs of hundreds of thousands of peasants.
Explanation:
An astrolabe is a primitive angle-measuring tool. It can be used to - very in-exactly! - measure the altitude above the horizon of a celestial body like the Sun, Moon or Polaris in order to calculate your position.
Medieval gunners used the astrolabe to calculate the height of towers and buildings, in order to more accurately aim their cannons.
The best reason as to why the caliphs demonstrated religious tolerance to Jews and Christians would be because "D. the caliphs knew freedom of worship led to an overall stronger empire," since allowing people to worship freely meant that they were less likely to rebel against the state.
D they act denied free blacks
Bourbon Spain, British empire, and kingdom of Portugal
