Answer:The statement is false. The hydrosphere includes all the water on Earth, not just seawater. This includes: - Oceans: The largest part of the hydrosphere, but not the only part.- Rivers and lakes: Freshwater sources that are essential for life.- Groundwater: Water found beneath the Earth's surface.- Glaciers and ice caps: Frozen water that makes up a significant portion of the hydrosphere.- Atmosphere: Water vapor in the air, which contributes to weather patterns. So, while seawater is a major component of the hydrosphere, it's not the only one.