C.) the process of bone remodeling ceases
the reason is because you don't reach full bone density till you are mid twenties and bone remodeling decreases from that time depending on how you preserve your bones.
You will need cardiovascular endurance/fitness in order to play water polo because you will be in the water and constantly swimming therefore you will really need to work on cardiovascular endurance when playing water polo.
Hope that this helped you out hon :)
Interact would be the answer
Hope it helps!