Final answer:
Louisiana is divided into 64 geographic sections called parishes, and the major physical feature along the border of the state is the Mississippi River.
Step-by-step explanation:
In Louisiana, the state is divided into geographic sections known as parishes. There are 64 parishes in total. Additionally, one major physical feature, the Mississippi River, is located along the border of the state. The correct answer to the question is A) Parishes, Mississippi River.
Parishes are Louisiana's equivalent to counties, which are used in most other states. The term is inherited from the state's French and Spanish colonial history. The Mississippi River is not only a vital physical feature for Louisiana but also a significant economic and cultural asset. It serves as a major transportation route and provides access to the Gulf of Mexico.