Name a physical property of water that is crucial for supporting aquatic life.

High specific heat capacity is a crucial physical property of water that plays a significant role in supporting aquatic life. This property allows water to absorb and store large amounts of heat without experiencing significant changes in temperature. As a result, aquatic environments, such as lakes and oceans, maintain relatively stable temperatures, creating a favorable habitat for various organisms. Stable temperatures are essential for metabolic processes in aquatic life, allowing species to survive and thrive in their environments.

In contrast, a low boiling point would not support aquatic life effectively; if water boiled at lower temperatures, it would lead to rapid loss of habitat and disruption of ecosystems. High density at all temperatures is not accurate, as water's density actually decreases when it freezes, allowing ice to float and providing insulation to aquatic organisms below. Lastly, low surface tension is less relevant to overall support of aquatic life compared to the temperature stability provided by high specific heat, although it does facilitate some processes like the ability of small organisms to walk on water.