Which of the following factors most contributed to the end of the han dynasty?
huns were invading from the north.
depraved aristocrats no longer followed the traditions of confucianism and legalism.
qin shi huang, founder of the qin dynasty conquered them.
invaders began to cross into the northern plain over the hindu kush mountains.

yes

explanation:

the hyksos invasion. the hyksos were able to attack egypt successfully because of their skills in using bronze weapons, composite bows and the use of the horse and chariot during the invasion. although the egyptians depict a barbarian-type overthrow, the truth is the seizure was likely a relatively peaceful one.

these civilizations were located around fertile rivers, where they could produce an abundance of crops