Answer:
situation
Step-by-step explanation:
Situation is a concept in Geography which explains that the location of a place and its connectedness to other areas, as well as certain features in it, are a determining factor to how good the place is for trade and habitation. The physical, climatic, and economic factors are major factors to be considered in describing a location.
Shanghai city is home to the busiest port in the world and this is a result of the physical feature found there which is the sea. So, its situation close to the sea is key to making it a busy trade center. Also, how favorable the climatic conditions of a place is would be helpful in describing the suitability of the geographical location.