In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

Highly anoxic, this body of water's lower levels are almost completely lifeless due to the high concentration of hydrogen sulfide, and its water circulates through the Rim Current. The Karkinit Bay sits on its north, and islands in this body of water include Berezan and Fidonisi, while cities on its shores include Sochi and Constanta. Sitting on the Skifsky Platform, it is probably a residual basin of the Tethys Sea, while the two straits that connect it to other bodies of water are the Kerch Strait and the Bosporus, which connects it to the Sea of Marmara. Known to the ancient Greeks as "Axenos," or "Inhospitable," for ten points, idenitfy this body of water that borders, among others, Ukraine and Russia, and contains the Crimean Peninsula.
Social Science