Agua, or water, is a clear, colorless liquid essential for all forms of life. It covers about 71% of the Earth's surface and is found in oceans, rivers, lakes, and glaciers. Water is vital for drinking, agriculture, and industry, making it a crucial resource for human survival and development. In its chemical form, agua is composed of two hydrogen atoms and one oxygen atom, represented as H2O. It exists in three states: solid (ice), liquid (water), and gas (water vapor). The water cycle, which includes processes like evaporation and precipitation, helps maintain the balance of this important resource in nature.