Concept:Plants in the diagrams absorb water mainly from the water held as capillary water in the soil.
Explanation:Soil water exists in three main forms.
Gravitational water moves down freely under gravity and is not retained in the root zone.
Hygroscopic water stays tightly bound as a thin film on soil particles, so roots cannot absorb it.
Capillary water is held in the tiny spaces between soil particles by surface tension.
Root hairs absorb this capillary water through osmosis, making it the main water source for plants.
Thus, the diagrams show that the major source of water to the plants is capillary water.
Answer:B. capillary water
