Land degredation is a major issue worldwide and poses a threat to the sustainability of agriculture and economic development of many third world countries. Which answer choice is NOT a form of land degredation that needs to be addressed? A) Wind and wave erosion in coastal regions. B) Water erosion from run-off in mountainous regions. C) Water erosion during the rainy season in semi-arid regions D) The reclamation of land at the mouths of rivers formed by silt deposits