Which process is primarily responsible for the movement of water from the soil into the air from leaves?

• A. Photosynthesis
• B. Transpiration
• C. Filtration
• D. Infiltration

Answer: (B)

Transpiration is the process that primarily facilitates the movement of water from the soil into the air through leaves. During transpiration, water is absorbed by plant roots from the soil and then moves up through the plant to the leaves. Once it reaches the leaves, some of the water evaporates into the atmosphere. This process is crucial for plants because it helps in nutrient transport and maintaining plant temperature, as well as contributing to the water cycle.

In contrast, photosynthesis involves the conversion of light energy into chemical energy, primarily occurring alongside transpiration, but it does not directly describe the movement of water into the air. Filtration refers to the process of removing impurities from a liquid, which doesn’t apply to the movement of water within plants. Infiltration pertains to the process by which water enters the soil, not how it exits the plants into the atmosphere. Thus, transpiration is distinctly the process responsible for moving water from the soil, through the plant, and into the air.