Water, food, and energy are crucial for survival and development. The connection between these resources, known as the water-energy-food nexus, is important to understand. Different methods and tools are used to analyze this nexus, with a focus on regions like Asia, Europe, America, and Africa. Studies on the water-energy-food nexus have increased, helping us better grasp the interconnections between water, food, and energy. By studying this nexus, we can find solutions to challenges and create sustainable systems for water, energy, and food.