Answer:
they were weakened becuase they got weak
cultivation of water animals, such as eel and fish.
The Mongols were a nomadic tribe to the north of China. They shared the mountainous areas between China and Siberia with many other such tribes, many of them Turkic.
The last Chinese dynasty did not end in any of these options. Puyi was forced to abdicate in 1912 but was restored to the throne for a 11 days in 1917. In 1916, Yuan Shikai seized power and proclaimed himself emperor in 1916.
<span>In the United States, the second half of the 20th century brought about historical socio-political movements that revolutionized American culture. Following the end of World War II in 1945, the U.S. entered a new era, experiencing a sharp growth in population, a successful economy, and an increased standard of living.</span>
