Why is the relationship between Egypt and Nubia described as one of interdependent?

The relationship between Egypt and Nubia is described as interdependent due to their mutual reliance on each other's resources, trade, and cultural exchange. Nubia provided Egypt with valuable materials such as gold, ivory, and ebony, while Egypt offered agricultural products and advanced technologies. This interconnectedness fostered both economic ties and cultural influences, as seen in art, religion, and governance. Over time, these interactions led to periods of cooperation and conflict, further solidifying their interdependent relationship.