👉 A fluid is primarily composed of water, though it can also include other substances like salts, minerals, and organic compounds. Water is the most abundant and universally recognized fluid, playing a crucial role in all living organisms and natural processes. It exists in various states—liquid, vapor, and ice—but its liquid form dominates Earth's surface and atmosphere, facilitating essential functions such as temperature regulation, nutrient transport, and chemical reactions. This fluid's unique properties, including its high specific heat capacity and ability to dissolve a wide range of substances, make it indispensable for life and environmental processes.
