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Biodiversity refers to the variety and variability of life forms on Earth and includes diversity at three interconnected levels: genetic diversity within species, species diversity within ecosystems, and ecosystem diversity across landscapes. It encompasses all living organisms—plants, animals, microorganisms—and the ecological complexes of which they are part. Biodiversity is not only about the number of species but also about the interactions among them and with their physical environment. It forms the foundation of ecosystem functioning by regulating processes such as nutrient cycling, energy flow, pollination, soil formation, and climate regulation. High biodiversity enhances ecosystem resilience, enabling natural systems to adapt to environmental changes and disturbances, while loss of biodiversity weakens ecological stability and reduces the capacity of ecosystems to provide essential services to human society. From an ecological perspective, biodiversity is critical for maintaining balance within ecosystems. Each species plays a specific role, whether as producer, consumer, decomposer, or regulator of populations. Genetic diversity within species ensures adaptability to changing environmental conditions, diseases, and climate variability. Species diversity contributes to food web complexity and ecological interactions, while ecosystem diversity supports a wide range of habitats such as forests, wetlands, grasslands, rivers, and coastal systems. In the context of human development, biodiversity provides direct benefits like food, medicine, fuel, and raw materials, as well as indirect benefits such as air and water purification, flood control, and cultural and recreational values. Rapid urbanization and industrialization have emerged as major drivers of biodiversity loss, particularly in urban areas. Expansion of cities often leads to habitat destruction, fragmentation, pollution, __________ _____ _______ ____ _______ ____ ___ ______ _____ ____ ____ ________.
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