Which type of load has a greater weight to surface area ratio?

The correct choice is high density load, which is characterized by a greater weight to surface area ratio. This means that high density loads are heavier relative to their surface area compared to the other types of loads.

High density loads are typically made of materials that are compact and heavy for their size, such as metal or certain types of machinery. This characteristic makes them advantageous in certain logistical scenarios because they occupy a smaller surface area while providing a significant amount of weight. In contrast, aerodynamic loads and low density loads generally have lower ratios due to their construction and physical characteristics. Aerodynamic loads are influenced by factors like drag and lift, which depend significantly on their shape and surface area rather than just weight. Low density loads, like light materials or bulky items, have larger surface areas relative to their weights, leading to lower weight to surface area ratios. Average density loads fall in between but do not match the efficiency of high density loads in terms of packing heavy items into smaller footprints.