Answer the following question given this paragraph: 

Hydrogen bonds between water molecules explain some of water’s properties. For example, hydrogen bonds explain why water molecules tend to stick together. Have you ever watched water drip from a leaky faucet or from a melting icicle? If you have, then you know that water always falls in drops rather than as separate molecules. The dew drops in Figure below are another example of water molecules sticking together.


Q: What explains why water molecules tend to stick together?

 Choices:

- helium bonds

- covalent bonds

- mineral bonds

- hydrogen bonds

A:
hydrogen bonds
