Understanding 'Over Which' in Describing Resource Exchange Surfaces

This sentence uses 'over which' to describe the surface areas where resources are exchanged with the environment. This choice emphasizes the extent and location of these surfaces. Using 'on which' could lead to misinterpretation, suggesting that resources merely exist on the surface rather than actively engaging in exchange with the environment. Therefore, 'over which' more accurately reflects the dynamic nature of resource exchange with the environment.