What is the role of hydrogen bonds in water's properties?

The correct answer highlights the significant role that hydrogen bonds play in contributing to water's high surface tension. Water molecules are polar, meaning they have a slight positive charge on one side and a slight negative charge on the other. This polarity allows for hydrogen bonds to form between the hydrogen atoms of one water molecule and the oxygen atoms of nearby molecules.

These hydrogen bonds create a strong cohesive force among water molecules, resulting in high surface tension. This property enables water to resist external forces, allowing it to form droplets and supporting small objects that may sit on the surface. The strength of the hydrogen bonds is directly related to the ability of water to maintain its structure and the forces at play on its surface.

In contrast, options related to cohesion, solvent properties, and heat capacity do not accurately reflect the role of hydrogen bonds in water. For instance, water actually acts as an excellent solvent due to its polarity, and hydrogen bonds contribute to water's relatively high heat capacity, enabling it to absorb and retain heat without undergoing significant changes in temperature quickly.