Active absorption of water by roots from the soil is mainly affected by

Tension in cell sap due to transpiration.

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Hydrophobic nature of root hair.

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Typical tissue organisation.

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Osmotic concentration of xylem sap.

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Solution

The correct option is C Osmotic concentration of xylem sap.
Active absorption is the movement of water molecule along the gradient with the use of energy.
Osmotic pressure is the movement of a solute particle from low concentration to high concentration through a semi-permeable membrane.
So, the water will move from a higher concentration to a lower concentration.
So, the correct option is 'Osmotic concentration of xylem sap'.

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