Option 1 -> Rambling means wandering without direction or purpose, lacking coherence and organization.
Option 2 -> Fertile means productive or capable of producing abundant growth, unrelated to desultory.
Option 3 -> Imperfect means flawed or incomplete, but doesn't capture the random, disconnected nature of desultory.
Option 4 -> Regular means systematic and orderly, which is the opposite of desultory.
Hence, Option 1: Rambling -> DESULTORY describes something that lacks consistency, jumps from one thing to another without plan or purpose, and is scattered in nature. "Rambling" perfectly captures this meaning as it refers to something that wanders aimlessly and lacks coherent direction -> correct