Concept:The upward movement of water in tall trees is driven by transpiration pull, along with the cohesive and adhesive properties of water.
Explanation:Transpiration pull is created when water evaporates from the leaves through stomata.
This evaporation creates a negative pressure (suction) in the xylem vessels.
The suction pulls water upward from the roots to the leaves.
Cohesion: Water molecules stick to each other due to hydrogen bonding.
This cohesion forms a continuous water column inside the xylem.
It prevents the column from breaking under tension.
Adhesion: Water molecules stick to the walls of xylem vessels.
This adhesion helps counteract gravity and keeps the water column intact.
Together, cohesion and adhesion enable capillary action, which assists the upward movement.
Root pressure can also push water, but for tall trees, transpiration pull is the main force.
Thus, the correct combination is transpiration pull, cohesion, and adhesion.
Answer:B. Transpiration pull, cohesion and adhesion