(N/A) The ascent of sap is the upward movement of water and dissolved minerals from the roots to the aerial parts of the plant.
$Xylem$ tissue is specialized for this function due to the following reasons:
$1$. It consists of tracheids and vessels which form a continuous pipe-like structure,facilitating the bulk flow of water.
$2$. The process relies on physical forces such as cohesive force (attraction between water molecules),adhesive force (attraction between water and $Xylem$ wall),and capillarity.
$3$. The transpiration pull,generated by the evaporation of water from leaves,creates a negative pressure that pulls the water column upward through the $Xylem$.