What biological benefit does water's high specific heat provide to organisms and ecosystems during the water cycle?

Correct answer: It provides thermal stability to organisms and aquatic environments

Correct answer: B, thermal stability. Specific heat is the amount of heat needed to raise the temperature of a unit mass of a substance by one degree. Water has a relatively high specific heat, so it can absorb or release considerable heat while its own temperature changes comparatively slowly. This moderates daily and seasonal temperature changes in ponds, lakes, oceans, and organisms whose bodies contain much water. A is wrong because high specific heat does not make water vaporise instantly; vaporisation also requires latent heat. C is wrong because heating does not reduce water's molecular mass. D is wrong because specific heat is a thermal property, not a measure of acidity. Memory cue: high specific heat means water changes temperature slowly and helps life avoid sudden thermal stress.