<span>The word for an array of nonaligned or friendly states that cushion or protect a larger country from invasion, as happened with the former soviet union and its eastern european neighbors is the buffer zone. It is created to specific areas that needs to be protected such as restrictions on the use of resources of that area and the country do its best to create measures to improve the conservation value of that area.</span>
<span>B. the length of the river that runs through the grand canyon</span>
The US purchased the Florida Territory from Spain... i think that was in 1819
Because they were so close to these rivers, they serve as sources of drinking water. What gave opportunity for people to settle and become sedentary, focusing initially on agriculture and land security, with this the population grew and avoided the risks of nomadic communities, not having to go to places unknown or dangerous or run out of food. Therefore, over time they then focused on more complex areas such as politics, economy and architecture. Promoting the development of the community that over the years were the foundations of modern civilization.
