(Turkey, Romania, Ukraine, Russia), make the case that Europe has no definitive eastern boundary.?

Thanks for the help! You have to make the case using at least 2 of the countries listed in brackets

Europe dose have a difintive eastern bourndry - the ural moutnains

Physically, it is part of Eurasia

Politically, boundaries are always subject to change

Traditionally, the eastern "border" of Europe has been the Ural Mountains, the Volga River, the Caspian Sea, the Caucasus Mountains, the Black Sea, and the Bosporus/Dardenelles Strait. That being the case, Romania and Ukraine are indisputably in Europe and irrelevant to your case. Russia extends beyond the Urals and the Volga and Turkey is mainly in Asia with a small piece on the west side of the Bosporus/Dardenelles. You must use Russia and Turkey as your examples.

Geological there is no such thing as Europe. It is all Asia.

"Europe" is a political construction.

What was Europe today will not be Europe tomorrow.