The process by which plants lose water vapor is called transpiration. This vital function occurs when water is absorbed by the roots from the soil and subsequently travels up through the plant to the leaves. In the leaves, water vapor escapes into the atmosphere through small openings called stomata. Transpiration helps regulate the plant’s temperature, facilitates the uptake of nutrients from the soil, and maintains the flow of water and minerals throughout the plant. Additionally, it contributes to the water cycle by returning moisture to the air, playing a crucial role in both plant health and the environment.