Final answer:
pH buffers help maintain homeostasis by ensuring a consistent pH level within an organism's body fluids, which is vital for its biochemical processes.
Step-by-step explanation:
The characteristic of life in which pH buffers could play a role is Maintain homeostasis. Homeostasis refers to the ability of an organism to maintain a stable internal environment despite changes in external conditions. pH buffers help maintain a consistent pH level within the body's fluids, which is crucial for various biochemical processes. By preventing drastic changes in pH, buffers are an integral part of an organism's feedback mechanisms that control homeostasis.