Word that means adapted for both land and water
D) amphibious
Step-by-step explanation:
The reason of this etymology of how the word is construed is given in the passage itself.
The word root amphi- means both and –bious means mode of life.
These two roots combine to form the word that is given here and it is pretty clear to see that these two roots combined will mean something along the lines of both modes of life.
The two modes of life being described here are life in see and life on earth.
So, the meaning of the phrase comes with the word Amphibious.