Answer:
hub – a central point of concentrated activity and influence
confederation - a loose organization of independent states
canton – a Swiss state
neutrality – the idea of not taking sides in a wаr
sirocco – a hоt, dry wind from northern Africa
graben – a long, narrow area that has dropped between to faults
diке – an embankment of earth and rock built to hold water back
lignite – a soft, brownish-black coal
polder – an area of low-lying land that has been reclaimed from the sea
strip mining – the process of removing the surface of the earth to lay bare mineral deposits