In soil, the water available for root absorption is:

Explanation

In soil, the water available for root absorption is capillary water, which is a type of soil water. Capillary water is the water that is held in the soil by capillary forces. These forces are the result of the attraction between water molecules and the soil particles. The smaller the pore size of the soil, the greater the capillary forces and the more water that can be held in the soil.When the soil is saturated with water, the excess water drains away and the soil is left with a mixture of air and water. The water that remains in the soil is held in the pore spaces between the soil particles. The water that is held in the smaller pore spaces is capillary water. The roots of plants absorb water from the soil by osmosis. The water moves from areas of high concentration (in the soil) to areas of low concentration (in the plant). The capillary water in the soil is the water that is most readily available for plant uptake. As the plant absorbs water from the soil, the water moves through the root cells and up into the stem and leaves. The water is transported through the plant in a system of specialized tissues called xylem. So correct option is B.