What is responsible for the six-fold increase in total freshwater withdrawals in the 20th century?

Question

Quizplus · Accepted Answer

The main reason for the six-fold increase in total freshwater withdrawals in the 20th century is irrigation for agriculture. Agriculture accounts for 70% of global water withdrawals, and as water-intensive crops (such as rice) become more widespread, the demand for water increases.

Answer: E 
 While irrigation for agriculture is the primary reason for the increase in freshwater withdrawals, the other choices (increase in hydroelectric power, increase in recreational use, and increase in per-capita water withdrawals) also contribute to the overall increase. The demand for electricity, for example, requires more freshwater for cooling power plants, and the growth in urban populations has led to an increase in per-capita water usage. Recreational activities such as swimming pools and golf courses also contribute to the overall demand for water.

What Is Responsible for the Six-Fold Increase in Total Freshwater