An Automobile should be a possible answer i do hope this helps
Answer:
The rotation of the earth
Explanation:
Years ago Native Americans discovered what they believed was a gold mine. They noticed a herd of 30 to 60 million Buffalo's roaming the plains. The Native Americans hunted the buffalo so they can maintain an accurate amount of food. By the 1700's the Native Americans tamed some of the buffalo, which made hunting easier. The Native Americans moved with the herds so they can have a good supply of food. The Native people used different methods of hunting. One method use is called the Dog Soldier. A group of Native people who are called this, push some of the herd over a cliff so some of the animals would die. During winter they would chance the larger animals onto frozen lakes and slaughter them. The ice made it difficult for the buffalo to run. Warriors did the killing. The woman were responsible for getting the meat. The rest of the buffalo was used for clothing, shelter and weapons. Native American knew that their survival depended on the buffalo. They never killed too many. They only killed wanted they needed and celebrated the life of the buffalo after.
Gorbachev's policy of perestroika refers to economic reforms.
The literal meaning of 'perestroika' is restructuring, referring to the restructuring of the Soviet economic system.
