What type of instrument was dandal?

Correct option is D

Harrowing is an important step in traditional farming that ensures the soil is fine and even, facilitating better seed germination and root development. The dandal, as a harrow, was likely made of wooden or metal components and dragged over the fields to perform this task. It helped create a suitable seedbed by leveling the soil and incorporating crop residues, which enhanced soil aeration and moisture retention. Instruments like the dandal reflect the ingenuity of early farmers in optimizing their land for better yields.