Where does/did your species live? In what type of ecosystem/habitat does your species live? What does your species eat? What other organism(s) preys on your species? What other organisms interact with the organisms identified in questions c and d above? What factors have caused a decline in (or the extinction of) your species? What major role does your species play in its ecosystem that would qualify it as a keystone species? How would it affect other organisms in the ecosystem if your species were removed completely?