What is the difference between a structural and functional adaptations?

Structural adaptations are physical features of an organism that enhance its survival in a specific environment, such as the thick fur of polar bears for insulation. In contrast, functional adaptations refer to physiological processes and functions that help an organism thrive, like the ability of certain plants to conserve water in arid conditions. Both adaptations are crucial for survival, but they differ in their nature—structural being about form and function being about processes.