Final answer:
Agriculture is the most common use for water worldwide, consuming about 70% of the global freshwater supply, especially in developing regions.
Step-by-step explanation:
The most common use for water worldwide is agriculture. This sector uses roughly 70% of the global freshwater supply, much of which is attributed to irrigation and livestock. This proportion is even higher in many developing regions where agricultural needs dominate water usage. In contrast, affluent countries tend to use a greater proportion of water for industrial processes and domestic use. However, overall, when considering worldwide statistics, agricultural water use outstrips that for domestic use, industry, and power plants.