Answer: D) The use of the domesticated horse in hunting and warfare.
Explanation:
With horses now domesticated, the Indians could travel so much further than before which led to them being able to hunt animals more effectively in many parts of the land.
The Indians also used the horses in warfare as some of them got so adept at using horses that they developed astonishing qualities which they then used to expand their territories against weaker tribes.
Emperor Quin Shi Huang had all the walls joined to one, making the great Wall of china
Answer: He would work for 12 to 14 hours at a time with little rest, no sanitation in the tunnels and starvation rations. Eugene became increasingly weaker and after 5 months caught pneumonia. He was taken to the camp infirmary in Harzungen where his life was saved by a German Luftwaffe doctor.
C. lazy
If this is on The Fall of the Roman Empire