What made philadephia a great area for factories and trade?

Philadelphia was great for trading and factories because it was on a river, located along the Delaware River and Schuylkill River, in the greater Delaware Valley.

People here in Philadelphia traded lumber, coal, furs, textiles, and bricks.

Philadelphia was a trade center for the colonies that based an important part of its economy on trade with the advantage that was located next to the river and had ports.

answer; i do believe that the (14th)fourteenth amendment is the correct answer

might be agreeing to participate ethically with other european nations in the slave trade

or notifying other european nations when taking possession   of african territories