Answer:
The correct answer is - Access to freshwater.
Step-by-step explanation:
A transport corridor is a linear area that is made up of one or more type of transportation such as public transit, highways, subway or railways that shares a common route or course.
Access of water is one the major reason that makes the large settelement around these transport corridors among given options as climate or lattitude is not a reason to leads to such settelement.