Question

countries most likely create internal boundaries to protect their territory divide territory for administrative purposes control the movement of goods and people improve postal service and infrastructure

Explanation:

Internal boundaries, such as state or provincial boundaries within a country, are primarily created to divide the territory for administrative purposes. This allows for more efficient governance, service delivery, and policy implementation at a local level. Protecting territory is more related to external boundaries. Controlling the movement of goods and people can be a function of some internal boundaries but is not the most fundamental reason. Improving postal service and infrastructure is a secondary or related outcome rather than the core purpose.

Answer:

divide territory for administrative purposes