How did the introduction of railroads impact the steel and oil industries?

Railroads made it possible to ship raw materials to factories and the manufactured goods they produced faster than ships and wagons. As people across the country purchased goods, factories had the capital to increase production.

for many centuries there were important factors which the economies of the muslim empires developed increasingly. they applied economic procedures in production, investment, finance, taxation and property. they used to tax certain goods (for example: harvest), they charged interest on money lent, they signed contracts with merchants; they relied on a common currency, and they used checks as well as promissory notes. with the money collected by means of taxation, the government provided the needy with an income. in addition, trading networks covered huge distances, so far regions started to have contact and exchange goods. this trade network covered areas of asia, africa and europe.

which of the following is a subsurface event that takes place during the rock cycle?