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