Final answer:
Physiological mechanisms and behaviors enhancing adaptability contribute to survivability, helping organisms to navigate and thrive in changing environments.
Step-by-step explanation:
Physiological mechanisms and behaviors that improve adaptability contribute to survivability. These mechanisms and behaviors are essential for an organism to survive and reproduce in changing environments. For example, the physiological mechanism of thermoregulation enables animals to maintain their body temperature, while migration is a behavioral adaptation that allows animals to relocate to environments more suitable for survival.