Some slave owners still used slaves, but after it was abolished they used rhinos to dig up crops with there horns.
Answer:
The theme of the poem may be to spend time together. If the message is given, do not leave your lover. Probably love has an important place in mangyan culture or they know how to love it more than us. I leave the third question entirely to you. Finally, I can not fully explain love, since I do not have a lover in my life.
Shi Huangdi had the Great Wall of China built to protect the Chinese states and borders against the raids and invasions of the various nomadic groups of the Eurasian Steppe. This included the Mongols to the north, which had been very powerful during the rule of Genghis Khan. The other purposes of the Great Wall were border controls, allowing duties on goods during the period of the Silk Road, regulation and encouragement of trade and the control of immigration and emigration.
A "bad Nile" is a lack of water or too much water, so possible consequences include:
Famine (from crops dying)
Destruction of property (from flood waters)
and much more. However, this type of question normally references something in the text, so I suggest checking that section to see if a specific example was ever given.