How did the location of the city of Rome help its economy grow?
A) The island location allowed for fishing.
B) Fertile farmland supported crop production
C) The Tiber River limited competition for trade
D) Plentiful natural resources made it self-sufficient.

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.

Cwould be the answer