Which geographic concept explains why port cities like Shanghai or Istanbul have become important centers for trade? distance-decay situation cultural landscape possibilism spatial-association

Situation

Explanation:

By geographic situation we are talking about the location or where these two cities are sites. Where a place is situated goes a long way in determining if it would grow to be a large place.

Shanghai and Istanbul are situated in areas with certain features that are good and useful for trade. These cities have waterways so they are good cities for trade