The most likely reason new factories were built in northern cities is the availability of resources and transportation infrastructure. Northern cities had access to key raw materials, a growing labor force due to urbanization, and extensive railroads and waterways that facilitated the efficient movement of goods. Additionally, the concentration of markets and consumers in these urban areas made it economically advantageous for manufacturers to establish operations nearby.
New England
They had economic specialization
Because they provided water power to run the machinery and a place to dump their waste
The cotton-growing South had to improvise an industrial base in a hurry. They built armaments factories, steelworks and shipyards to make all kinds of war-supplies that they were unable import because of the blockade.
When agriculture became entrenched in the South entrepreneurs built new factories to meet rising consumer demand.
Maquiladoras
to built buildings and factories due to growing population
The first factories in Belgium were built around the turn of the 19th century.
Steam-powered factories could be built in cities.
cars are built in car factories
They were built in catapult factories.
There are many factories built there because of it's many rivers to transport goods.
Most factories were built near water to power the machines.
Near water
yes it is
Factories and Mills
Torpedoes are built by factories using explosives, mechanisms, and propellers.