What percentage of Earth's water is found in oceans?

The correct answer is based on the understanding of Earth's water distribution. Approximately 97% of Earth's water is contained in the oceans. The oceans are the largest reservoir of water on the planet, playing a crucial role in the global water cycle and climate regulation. This large percentage underscores the predominance of saline water compared to freshwater sources.

The remaining 3% of water is found in various forms, including ice caps and glaciers, groundwater, and surface water such as lakes and rivers. While options like 50%, 75%, and 90% suggest significant quantities, they do not accurately reflect the true proportions of Earth's water reservoirs, particularly the overwhelming dominance of oceanic water. Understanding these statistics is essential for grasping the challenges related to water resource management and environmental conservation.