What strategy do plants use to move water in the xylem upwards to the highest points of the plant body?

Plants primarily use a combination of transpiration and cohesion-tension to move water in the xylem upwards to the highest points of the plant body. Transpiration, the loss of water vapor from the leaves, creates negative pressure or tension in the xylem. This tension pulls water molecules upward through the xylem due to cohesion (the attraction between water molecules) and adhesion (the attraction between water molecules and the xylem walls). As water evaporates from the stomata in the leaves, it creates a continuous flow of water molecules from the roots to the leaves, effectively transporting water upward throughout the plant. This process is often referred to as the cohesion-tension theory of water transport in plants.