Who has the highest military authority in the united states?
i'm thinking the president, but i want to make sure.

Commander-in-Chief is the highest authority, which is the President.

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.