It is Continental polar ( only if this is for apex)
Can you give more description ??
Another name is voltaic battery
Answer:
D I think I might be wrong its been a while scense I did something like that
The correct choice is Buffers.
Buffers contains both acids and bases in equilibrium.when base is added to buffers, they adjust the pH value by releasing hydrogen ions.when acid is added to buffers, they adjust the pH value by consuming hydrogen ions. hence these substances resist any change in their pH value by releasing or absorbing hydrogen ions.This process keeps the pH value constant.
