The teacher used a visual text (like a diagram, chart, or illustration) to explain the digestive system because it helps students understand better. The digestive system has many parts—such as the mouth, esophagus, stomach, small intestine, and large intestine—that work together to break down food and absorb nutrients. When pupils only hear or read about it, it may be confusing since they cannot imagine the process clearly. But with a visual text, they can see how food moves through each organ step by step. This makes learning more engaging and easier to remember because students connect the picture with the function of each organ.