Answer:
This transition everywhere is associated with the change from a largely nomadic hunter-gatherer way of life to a more settled, agrarian-based one, due to the inception of the domestication of various plant and animal species—depending on the species locally available, and probably also influenced by local culture.
Explanation:
The Southern politicians started to think and talk about secession because of multiple reasons, from economic to social ones. The Southern politicians did not had lot of things in common with the Northern politicians, nor did their respective states.
The Southern states were economically stronger. They had a very large agricultural production and large market to sell it, while the North was reliant on other means. The Southern politicians wanted to keep the things as they are socially, while the Northern ones wanted lot of changes. The slavery was also a major issue, as the South was seeing the slaves as a must for their economic prosperity, while the North wanted to abolish the slavery.
In general, the South and the North were like a cat and dog, pretty much disagreeing in everything, having different attitudes and approaches to pretty much everything. This led the Southern politicians to talk seriously about a secession as they were not seeing a future together with the North as they were radically differing from one another.
Answer: This US tried to expand its infulence in Asia.
Explanation: They were worried I guess.