If people tried to cross they would get shot
a form of reproductive isolation in which the breeding of two organismdo not want to mate to create a offspring .
An "arms race".
diplomacy
It is true that the Mexican government encouraged settlement of Texas by Americans to create a buffer zone between the two countries.
August 13 of 1961
An N-well in VLSI is a deep zone of highly N-type doped semiconductor, usually used to create reverse biased isolation junctions between components.
The Pyrenees Mountains form the border between Spain, France, and Andorra.
they prevented the colonists from trading with other foreign countries
create the Berlin Airlift and supply the city with food & fuel by plane from June 24th 1948 to May 11th, 1949
There's some confusion here. The Berlin Wall was built over eight years after Stalin's death ...
Segregation enforced physical separation between racial groups, limiting interactions and opportunities for socialization. This led to the development of separate communities, schools, and public spaces, ultimately creating social isolation by restricting relationships and fostering feelings of alienation and inequality among different groups.
the pact of common foreign policy