Which of the following methods of irrigation is best for a farm with an undulating landscape?

Of the four options listed, sprinkler irrigation is best for a farm with an undulating landscape. This is because sprinkler irrigation can apply water to crops in a uniform manner, regardless of the terrain, by spraying water over the crops. Sprinklers can be set up on risers or towers to accommodate changes in elevation, and can be adjusted to spray water at different angles and rates to match the slope of the land. Flooding, furrow, and basin irrigation all rely on gravity to distribute water, and are therefore less effective on sloping land. Flooding, for example, can result in erosion and runoff on steep slopes, while furrow and basin irrigation can lead to uneven distribution of water on undulating land.