Mexico occupied the southwest lands, and Britain shared the northwest Oregon Territory with the United States. Many Americans believed that the United States was destined to stretch across the continent from the Atlantic Ocean to the Pacific Ocean.
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The answer is "crosscutting cleavages
".
A cross-cutting cleavage happens when individuals that are on a similar cleavage, or division in the public arena (as per race, sexual orientation, ethnicity, geographic foundation, religion, and so on.), happen in various gatherings. A case of cross-cutting cleavage is that individuals from a similar ethnic gathering, (for example, Mexican-Americans) live in both the Northeast and the West in the United States.
Political researchers trust cross-slicing cleavages are a strategy to decrease strife in the public eye, as individuals from one gathering must join along various lines. At the end of the day, cross-cutting cleavages can enable individuals from various gatherings to cooperate to discover shared belief.
The 2nd one: What social skills are built by playing sports.
