The attraction between two similar molecule is

The attraction between two similar molecules is Cohesion.
Cohesion keeps molecules of the same substance together. For plants, cohesion keeps the water molecules together. Surface tension is the effect of intermolecular attraction that causes liquids to form a top or outer layer that behaves like a thin film of sorts.
Cohesion causes more water molecules to fill the gap in the xylem as the topmost water is pulled toward the stomata.