Correct Response: C. One indication that the water cycle is balanced between evaporation/transpiration and precipitation is that the total amount of atmospheric water vapor remains relatively constant, meaning that precipitation amounts offset water vapor added by evaporation and transpiration. A is incorrect because the total amount of fresh water on Earth is only about three percent of the total of all water. B is incorrect because whether precipitation falls as rain or snow is irrelevant in this context. D is incorrect because the proportion of water vapor produced by evaporation is approximately nine times greater than that produced by transpiration.
