Question

water molecules are held together by: metallic bonds ionic bonds polar covalent bonds hydrogen bonds

Explanation:

Water molecules are held together by hydrogen bonds. Hydrogen bonds form between the partially positive hydrogen atom of one water molecule and the partially negative oxygen atom of another water molecule. Metallic bonds are in metals, ionic bonds are between ions, and polar covalent bonds are within a water molecule (between H and O), but the intermolecular force holding water molecules together is hydrogen bonding.

Answer:

Hydrogen bonds