The primary reason for the decline of pollinator populations is multifactorial, primarily driven by habitat loss, pesticide use, and climate change. Urbanization and agricultural expansion reduce available habitats, while harmful pesticides can disrupt pollinator health and behavior. Additionally, climate change alters food availability and nesting sites for pollinators, stressing their populations. This decline threatens biodiversity and food security, as many crops rely on pollination services. Addressing these threats through conservation efforts is essential for preserving pollinator populations and maintaining ecosystem health.