Final answer:
Luxembourg is the country that is home to Upper Sure Lake and the Sure River, with the lake being a reservoir created by damming the Sure River.
Step-by-step explanation:
The country that has Upper Sure Lake and the Sure River is Luxembourg. Upper Sure Lake, or the Upper Sûre Lake, is a large reservoir in north-western Luxembourg. It was formed by damming the Sûre River, which is also known as the Sure River. The lake and the river are part of the picturesque Upper Sûre Natural Park, where people can enjoy various recreational activities like hiking, swimming, and sailing. The Sure River itself is a tributary of the Moselle River, which in turn is a significant waterway in western Europe.