What Three Species are endangered because of the construction of the Three Gorges Dam?

I don't think that the dam itself has created any further species. There are 47 endangered species which the official environmental assessment identified - and probably at least that many more!! That said, there are 4 very "high profile" species which are talked about a lot: "The baiji dolphin, the ancient river sturgeon and the finless porpoise depend on the Yangtze for their survival. The population of Siberian cranes in Poyang Lake will also be affected by the dam. These species may soon be extinct, and the Three Gorges Dam will accelerate their decline." I think that's what your teacher is trying to get you to find.