The correct answer is A. Capillary water.
Capillary water is the water that is held in the soil by capillary action. It is the water that is available to plants for absorption. Capillary water is held in the soil by the attraction between the water molecules and the soil particles. The water molecules are attracted to the soil particles by the same forces that cause water to rise in a straw.
Gravity water is the water that is held in the soil by gravity. It is the water that is not held by capillary action and is therefore not available to plants for absorption. Gravity water is the water that flows through the soil and eventually drains away.
Hygroscopic water is the water that is held to the soil particles by very strong forces. It is the water that is not available to plants for absorption. Hygroscopic water is the water that is held to the soil particles by the same forces that cause water to condense on a cold surface.
Chemical water is the water that is combined with the soil particles. It is the water that is not available to plants for absorption. Chemical water is the water that is held to the soil particles by the same forces that cause water to dissolve in a solution.
Capillary water is the most important type of soil moisture for plant growth. It is the water that is available to plants for absorption. Capillary water is the water that is held in the soil by capillary action. It is the water that is held in the soil by the attraction between the water molecules and the soil particles. The water molecules are attracted to the soil particles by the same forces that cause water to rise in a straw.