In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

Question: Surface tension comes from the fact that particles at the surface of a liquid do not experience interactions from all directions which leads to what on the surface? Answer: imbalance of forces
Surface tension comes from the fact that particles at the surface of a liquid do not experience interactions from all directions imbalance of forces leads to what on the surface.