The primary drivers of the hydrological cycle include processes such as evaporation, transpiration, condensation, and precipitation. Solar energy heats water bodies, causing evaporation, while plants contribute through transpiration, releasing moisture into the atmosphere. This vapor cools and condenses to form clouds, resulting in precipitation that replenishes freshwater sources. Human activities, such as urbanization and deforestation, can alter these natural processes, affecting water availability and quality. Understanding the hydrological cycle is essential for managing water resources and ensuring sustainability.