Q: What can water's high surface tension be attributed t?


Read this paragraph and choose the correct option from the provided answers:

Water has remarkable properties. Water expands when it freezes, even though all other substances contract. This means that in the winter ice on a pond or lake will float. Water has high surface tension because polar molecules tend to stick together. That's why drops stick together or some bugs can walk on the surface of a pond. Without water, life might not be able to exist on Earth. If it did exist, it would not be as diverse or as complex.

 Choices:

- territorial molecules sticking together

- molecules create a thin film-like substance

- electric impulses in atoms

- polar molecules sticking together


A:
polar molecules sticking together