Land degradation is a major issue worldwide and poses a threat to the sustainability of agriculture and economic development of many third world countries. Which statement best describes the major cause of land degradation in these countries?

(10 points) 1. cone 2. rectangle 3. triangle 4. circle 5. cylinder a. perpendicular cross section of a pyramid b. perpendicular cross section of a cylinder c. parallel cross section of a sphere d. shape created when a rectangle is rotated about the y-axis e. shape created when a right triangle is rotated about the y-axis