<span>They believed that when troubles such as natural distasters, uprisings, floods, invasions and etc. happened that meant the Mandate of Heaven had been taken away and it was time for new rulers</span>
<span>according to overlapping-waves t</span><span>heory, when given challenging problems, children try out various strategies and observe which work best, which work less well, and which are ineffective.
Overlapping-waves theory made the assumption that after doing the same thing over and over again, people will find a unique and personal way to achieve the completion of that task which give them the most efficiency. This occurrence led to the formation of expertise in most people.</span>
Answer:
The colonies did not abolish slavery after the Revolutinary War was because the United States economy depended on slave labor, and lawmakers did not want to dismantle the economy.
Explanation:
Answer:
Sultan Murad II laid siege to Constantinople in 1422, but he was forced to lift it in order to suppress a rebellion elsewhere in the empire. In 1444 he lost an important battle to a Christian alliance in the Balkans and abdicated the throne to his son, Mehmed II.