Which construction method is required when building on a terraced site location?

In the context of construction on a terraced site location, the use of retaining walls is essential. Retaining walls are structures designed to hold back soil and support the vertical or near-vertical slopes of the earth. When building on a terraced site, which often involves uneven land with distinct levels, retaining walls create stability and prevent soil erosion or landslides. These walls can be solid or composed of other materials like timber or concrete, and they help to create level areas for building while maintaining structural integrity.

Utilizing a raised pad or earth berm may also be relevant in certain situations, but they do not provide the same level of support and prevention against soil movement as retaining walls. Additionally, using explosion is not a feasible or safe construction method and is not applicable for site preparation in terraced locations. Thus, retaining walls stand out as the necessary and most effective construction method in this context.