Bladder is definitely the word
D) because those birds are scavengers and therefore there will be competition in finding food and then to fight off the other birds so that you can get the food first.
Competition is the interaction in which both are harmed....
Hydrosphere...did you know that hudor is the greek word for water? (This helps me remember this atmosphere and what it's responsibility in Earth is, and a cool fact to share with your teacher and classmates)
