The correct answer is option 1, The Netherlands. The busy port of Rotterdam is located in the Netherlands. Rotterdam is one of the largest and busiest ports in the world, handling millions of tons of cargo every year. It is situated on the banks of the Rhine River and is connected to the North Sea. Rotterdam is known for its extensive infrastructure, modern facilities, and efficient logistics, making it a key hub for international trade. The port serves as a gateway for goods entering and leaving Europe, and it plays a crucial role in the transportation of goods to various parts of the continent. Additionally, Rotterdam is well-connected to other major cities in the Netherlands and Europe, making it an important transportation and logistics hub.