Answer:
cities, farms, roads or bridges
I'm pretty sure the answer is weak central government
hope this helps :D
formed by chemical action of groundwater
Explanation:
The first column charted by Diana was formed by the chemical action of groundwater on the terrain.
Column 1 Column 2
Sinkholes Hotsprings
Caverns Geysers.
Sinkholes and caverns are products of chemical action of ground water in an area underlain by limestone.
A sinkholes is a prominent feature found in karst topography. It occurs when underlying beds are weathered and dissolved away causing the roof to collapse eventually.
A cavern is chamber or compartments found in a cave body, they a result from an extensive and prolong chemical weathering action.
learn more:
Chemical weathering brainly.com/question/1970623
#learnwithBrainly
External migration takes place for educational or economic reasons as well, but often, it is politically motivated.
But, internal migration can be defined as the human migration within one geopolitical entity, usually a nation.
Hope it helps!