Answer:
Water has a high heat capacity
Step-by-step explanation:
This means that the amount of energy that water takes for its temperature to be raised by one degree is high than most other materials. This means that even in a hot day, as the surrounding environment gets extremely hot, the water temperatures in the pond do not rise considerably. The water will act as a temperature buffer because the water also loses heat slowly just as it gains slowly. This protects the fish from heat shock.