Which of the following factors is the least important in selecting a site for a fish-pond?

The least important factor in selecting a site for a fish-pond is the availability of manure. While manure can be beneficial for the growth of aquatic plants and the production of natural food for fish, it is not essential for the establishment of a successful fish-pond. The topography of the site, soil type, and availability of water are all crucial factors in selecting a suitable location for a fish-pond. The topography of the site will determine the water flow, while the soil type will determine the ability of the pond to retain water. Availability of water is obviously essential since it is the primary resource in a fish-pond, and it should be in sufficient quantities and quality. In summary, while manure can be a useful resource for a fish-pond, it is not a crucial factor in selecting a site for a fish-pond, and the topography of the site, soil type, and availability of water should be given higher priority.