In what direction does the force act on a molecule at the surface of a liquid? Explain.

The spiders and insects move and run about on the surface of water without sinking because

When a drop of water is dropped on an oil surface, then:

If for a liquid in a glass vessel,the force of cohesion $(F_C)$ is twice the force of adhesion $(F_A)$,then which of the following statements are correct?
$(A)$ The meniscus will be convex.
$(B)$ The liquid will wet the glass.
$(C)$ The angle of contact will be obtuse.
$(D)$ There will be capillary descent in a glass capillary dipped in the liquid.
Correct option$(s)$ is/are:

Surface tension of a liquid is found to be influenced by

Explain surface tension in the context of potential energy.