The significance of the global water cycle lies in its role in regulating Earth's climate, ecosystems, and natural resources. This cycle involves the continuous movement of water through processes such as evaporation, condensation, precipitation, and runoff. It supports life by distributing fresh water across the planet, allowing for the maintenance of ecosystems and agricultural practices. The water cycle also plays a crucial role in weather patterns and the global climate, influencing temperatures and environmental conditions, making it fundamental to sustaining biodiversity and human activities.