Concept:Monoculture is the repeated cultivation of the same crop on the same land, which allows specific pests and diseases to multiply.Explanation:Growing one crop continuously provides a steady food source for its particular pests and disease-causing organisms.Their populations increase quickly, leading to severe pest and disease outbreaks.Crop rotation prevents this buildup, but monoculture encourages it.Soil texture and soil microbes are not the major disadvantages of monoculture.Answer:C. diseases and pests build up