Explanation:

The cohesive forces between liquid molecules are responsible for the phenomenon known as surface tension.
Surface tension explains why Bubbles are spherical.
1) Water doesn’t spread on some surfaces but forms droplets.
2) Oil and water don’t mix; water wets us but not ducks.
3) Hairs of brush stick together when removed out of water.
4) Raindrops are spherical. Oil rises in wick; sap and water rise in plants.
5) Particles of soil remain separated under water but stick together when taken out.
6) When glass pieces are melted the edges take rounded shape and become smooth, this is called fire polishing.
The molecules at the surface do not have other like molecules on all sides of them and consequently they cohere more strongly to those directly associated with them on the surface. This forms a surface "film" which makes it more difficult to move an object through the surface than to move it when it is completely submersed.
The liquid drops are spherical because of surface tension. It is the force with which atoms/molecules on the surface of liquid pull each other towards themselves. Hence when small amount of liquid is separated from rest in the form of drop, the whole amount of liquid gets in the most energy efficient shape i.e. sphere due to the attraction of atoms/molecules, which we call surface tension.
If the liquid doesn't rise or fall, that means there is no component of the force due to surface tension in the vertical direction