The correct answer to this open question is the following.
Although you forgot to include the excerpt and the options of the question, we can say the following.
Despite geographic separation and diverse environments, many American Indian peoples used some common practices. According to the excerpt, the practice that was unique to the Plains Indians was the use of domesticated horses in hunting and warfare.
These Native American Indian tribes used horses for primary necessities and activities to survive. They were farmers and hunters. They needed to go hunt animals to feed their families. In the 1600s, the horse represented the chance to effectively hunt animals and a great asset when they wage war against other tribes. Among these tribes that used to hunt Buffaloes as their primary hunt, were the Comanche, Arapaho, Cheyenne, Apaches, and Lakotas.
October 1962, an American U-2 spy plane secretly photographed nuclear missile sites being built by the Soviet Union on the island of Cuba. President Kennedy did not want the Soviet Union and Cuba to know that he had discovered the missiles. He met in secret with his advisors for several days to discuss the problem.
After many long and difficult meetings, Kennedy decided to place a naval blockade, or a ring of ships, around Cuba. The aim of this "quarantine," as he called it, was to prevent the Soviets from bringing in more military supplies. He demanded the removal of the missiles already there and the destruction of the sites. On October 22, President Kennedy spoke to the nation about the crisis in a televised address.
President Kennedy signs Cuba quarantine proclamation
No-one was sure how Soviet leader Nikita Khrushchev would respond to the naval blockade and US demands. But the leaders of both superpowers recognized the devastating possibility of a nuclear war and publicly agreed to a deal in which the Soviets would dismantle the weapon sites in exchange for a pledge from the United States not to invade Cuba. In a separate deal, which remained secret for more than twenty-five years, the United States also agreed to remove its nuclear missiles from Turkey. Although the Soviets removed their missiles from Cuba, they escalated the building of their military arsenal; the missile crisis was over, the arms race was not.
In 1963, there were signs of a lessening of tensions between the Soviet Union and the United States. In his commencement address at American University, President Kennedy urged Americans to reexamine Cold War stereotypes and myths and called for a strategy of peace that would make the world safe for diversity. Two actions also signaled a warming in relations between the superpowers: the establishment of a teletype between the Kremlin and the White House and the signing of the Limited Nuclear Test Ban Treaty on July 25, 1963.
In language very different from his inaugural address, President Kennedy told Americans in June 1963, "For, in the final analysis, our most basic common link is that we all inhabit this small planet. We all breathe the same air. We all cherish our children's future. And we are all mortal."
Francisco Pizarro led the conquest of the Inca Empire.
One thing is that all males were also granted equal rights under the law and had the right to religious dissent.
helped the Aztec farm more productive - chinampas
helped the Inca travel long distances and communicate with their neighbors - rope bridges
helped the Maya view astronomical phenomena such as eclipses with the naked eye - pyramaid at Chichen Itza
