Which of the following adaptations can increase the efficiency of diffusion in exchange surfaces?

The correct answer is C. Diffusion is the movement of substances from an area of higher concentration to an area of lower concentration through a membrane or other barrier. Increasing the surface area of the exchange surface increases the number of points where substances can enter or exit, which can help to speed up the rate of diffusion. Decreasing the distance that substances need to travel can also increase the efficiency of diffusion because it reduces the time it takes for substances to reach their destination.