Answer: Surface tension
Explanation:
Surface tension is the net downward force acting on the surface of liquids due to the cohesive nature of liquids.
Water molecules are bonded by strong hydrogen bonding between the hydrogen atom and the electronegative oxygen atom. Thus water molecules present on the surface are strongly attracted by the molecules present below the surface and thus act as a stretched membrane.
The surface acquires a minimum surface are and thus acquire a spherical shape.
Heat capacity of water is high due to strong hydrogen bonding between water molecules.
Thus surface tension of water results from the high cohesion between water molecules.
