Individual life
At the individual level, Adaptation appears during transition.
Travel, injury, changing work, parenthood, aging, loss, recovery, and new responsibility all reveal whether the person has a useful range or depends on one narrow operating condition. A perfectly maintained plan may be less durable than a lighter rhythm that can bend without disappearing.
The goal is not endless exposure or toughness. It is enough variability, challenge, and recovery for the system to remain capable when life stops following the preferred script.