Death
Death demonstrates perfect adaptability by requiring no adaptation whatsoever. It functions identically in every environment, every era, every circumstance. Deserts, oceans, mountaintops, and urban centres all accommodate death with equal facility. It has operated continuously for approximately 3.8 billion years without requiring modification, update, or evolutionary pressure. Death is already optimally adapted because it represents not a process but an absence of process. One cannot improve upon cessation. The concept requires no food, no shelter, no particular temperature range. It simply awaits.
Penguin
Penguins have achieved remarkable specialisation rather than broad adaptability. They surrendered flight for swimming, warmth for Antarctic survival, and dignity for that distinctive waddle. Emperor penguins endure temperatures of minus forty degrees through behavioural rather than physiological adaptation, rotating through their famous huddles with mathematical precision. However, place a penguin in a forest and observe its complete helplessness. These birds have traded versatility for excellence in one specific niche, becoming utterly dependent upon conditions found in limited geographical regions.
VERDICT
Death succeeds through universal application. Penguins adapted magnificently to Antarctica; death adapted to absolutely everywhere.