Which property of water helps to stabilize temperature in living organisms?

The correct answer is the property of water that allows it to stabilize temperature in living organisms is high specific heat. This means that water can absorb and store a significant amount of heat energy without experiencing a large change in its own temperature.

This property is crucial for living organisms because it helps maintain a relatively constant internal environment, which is essential for the biochemical processes that underpin life. For instance, aquatic environments benefit from water's high specific heat, as it helps to regulate the temperature of the water body, providing a stable habitat for aquatic organisms. Similarly, in animals, the high specific heat of water inside their bodies helps buffer against temperature fluctuations that could otherwise disrupt physiological functions.

In contrast, other properties such as viscosity, density, and polarity do not directly contribute to temperature regulation in the same way. Viscosity relates to how easily a liquid flows, which is important for movement but not for thermal stability. Density is relevant for buoyancy and habitat structure, while polarity contributes to water's solvent properties and its unique interactions with other molecules, but not directly to temperature stabilization.