Where did his thumb go
if ykyk

Ifound this on google “the existence of agglomeration economies is central to the explanation of how cities increase in size and population, which places the phenomenon on a larger scale. the concentration of economic activity in cities is one reason for their development and growth.” i hope this you for what your looking for.

It covered the territory of land across eurasia from northeastern europe to the pacific ocean.

Ithink the answer is b