Wow. Because Euro ends with an O and Oslo starts with and O, I got it in my head that this was a word chain quiz, and that made getting the next answer take way longer than it needed to.
You should accept 'dijk' as well - that's what we call it here in the Netherlands. Otherwise change the question to 'What is the English translation of the Dutch word for levee?'
I will never get over the Europeans deciding that the Sami are indigenous to the continent but no one else is. If a skeleton from the stone age can be traced to a likely descendent living a few miles away, you're probably indigenous.
Rather more so than the Netherlands question, but I went for Dijk first on that one too as it looked to be leading me to that