ANSWER
Adaptive mechanisms are features built into a system that enable it to adjust its behavior or structure in response to changes and stressors in its environment. Instead of simply resisting change, these mechanisms allow the system to learn from disturbances and evolve, potentially leading to improved performance or resilience. Examples include feedback loops, where information about system performance is used to self-correct, and modular designs, which allow parts of the system to be modified without disrupting the whole. In the context of antifragility, adaptive mechanisms are key: they transform moderate challenges into opportunities for growth.