Final answer:
Two water molecules most likely interact through hydrogen bonding, where the partially positive hydrogen of one molecule is attracted to the partially negative oxygen of another, affecting water's properties significantly.
Step-by-step explanation:
The most likely way that two water molecules will interact is through hydrogen bonding. The water molecule has a polar nature due to the electronegativity of oxygen creating a partial negative charge and leaving hydrogens with a partial positive charge. Water is a bent molecule, making the molecular dipole even more pronounced.
In this interaction, the partially positive hydrogen atom of one water molecule is attracted to the partially negative oxygen atom of another water molecule. This results in a network of hydrogen bonds that greatly influences water's physical properties, such as its high boiling point, surface tension, and its role as an excellent solvent for many substances in human physiology and nature.