Which best describes why water has relatively high surface tension?

Water has a high surface tension because the water molecules on the surface are pulled together by strong hydrogen bonds. That means a drop of water will "want" to have the smallest possible surface area.

It is due to surface tension that makes water seem to be behave as if it covered by an elastic skin

Explanation: Surface tension is the tendency of liquid surfaces to shrink into the minimum surface area possible. Surface tension allows insects, usually denser than water, to float and slide on a water surface