Brief history of the fall of the Abbasid caliphate

In 1258, the Mongols arrived at Baghdad, the capital city of the Abbasid Caliphate. The Caliph at the time believed that Baghdad could not be conquered and refused to meet the Mongols' demands. The leader of the Mongols, Hulagu Khan, then set siege to the city.

Explanation:

answer; (b) asia;

copernicus finished the first manuscript of his book, "de revolutionibus orbium coelestium" ("on the revolutions of the heavenly spheres") in 1532. in it, copernicus established that the planets orbited the sun rather than the earth. he laid out his model of the solar system and the path of the planets.