Concept:
Water in soil exists in different forms based on how tightly it is held.
• Gravitational water: Moves downward due to gravity and percolates deep into soil.
• Capillary water: Held in small pores and available to plants.
• Hygroscopic water: Tightly bound to soil particles, unavailable to plants.
• Combined water: Chemically bound in minerals.
Step 1: Understand percolation.
Percolation means downward movement of water through soil layers.
Step 2: Identify correct type.
Water that moves downward due to gravity is gravitational water.
Step 3: Analyze options.
• (A) Gravitational water: Correct
• (B) Capillary water: Held in pores
• (C) Combined water: Chemically bound
• (D) Hygroscopic water: Tightly bound
Step 4: Conclusion.
Thus, the correct answer is gravitational water.
Final Answer: Option (A)