Final answer:
Genetically enhanced varieties of seeds offer greater resistance to disease and pests, reduce soil loss on erosion-prone land, and improve efficiency in crop production.
Step-by-step explanation:
Genetically enhanced varieties of seeds are used by farmers because they provide several benefits. First, these varieties offer greater resistance to disease and pests. This means that the crops are less likely to be damaged by pathogens or eaten by pests, resulting in higher yields. Second, genetically enhanced seeds can reduce soil loss on erosion-prone land by providing stronger root systems that can hold the soil in place. Lastly, these varieties can improve efficiency in crop production by requiring less labor to harvest and reducing the need for synthetic pesticides.