So if we zoom in on the surface of the water in diagram A, we basically get the following picture. So let's compare the water molecules found deep inside that droplet and the water molecules found on the surface. So deep inside our water droplet, these molecules can easily move around. And that's because if they move from one location to a different location, it doesn't matter where they are within the water droplet, anywhere they are, they still are surrounded by cage of other water molecules. And that always creates intermolecular bonds. So beneath the surface of the water, the molecules can move around freely because by doing so, they are not losing any hydrogen bonds.