Biodiversity is important for ecosystem stability because it increases the resilience of the ecosystem to environmental changes. A diverse range of species provides different functions and services within the ecosystem, making it more adaptable to disturbances such as climate change, diseases, or natural disasters. Additionally, biodiversity contributes to nutrient cycling, soil formation, and overall ecosystem productivity, which are essential for maintaining a healthy and balanced environment. In essence, the more diverse an ecosystem is, the better it can withstand and recover from challenges, ultimately promoting stability and sustainability.