What nonrenewable resource played the largest role in the economic development of the Persian Gulf countries. gold oil silver water?

Oil is the nonrenewable resource that played the largest role in the economic development of the Persian Gulf countries. The discovery and extraction of oil in the mid-20th century transformed these nations, leading to significant economic growth, infrastructure development, and increased global influence. The wealth generated from oil exports has allowed Gulf states to invest in various sectors and improve living standards for their populations.