Reading and writing fill in the blanks

As the depth of the ocean increases, the water pressure and the amount of sunlight both decrease until about two thousand meters, after which the water temperature transformsremainspossessespreserves remains steady until about four thousand meters. In this pitch-dark and high-pressure zone, what ____________ these odd creatures to survive is their special adaptations. Astonishingly, numerous odd creatures have evolved here, their unique forms ____________ a marvel, fueling scientists' eagerness to explore further.