Final answer:
Grid Excavation is more common in single occupation prehistoric sites in rural areas to maintain artifact context. Stratigraphic Excavation and Test Trenching are more likely to be used in complex multi-layered urban sites for understanding different occupation layers. Remote Sensing benefits both site types in preliminary stages.
Step-by-step explanation:
Different excavation techniques are suited to different types of sites in archaeology. For a single occupation prehistoric site in a rural area, Grid Excavation is commonly employed, as it allows for careful mapping and recovery of artifacts across a consistent area. This technique helps maintain the context of each artifact, which is critical for understanding their use and significance.
On the other hand, a multi-layer urban site with complex stratigraphy typically involves Stratigraphic Excavation to delineate and understand the different occupation levels over time. Test Trenching might be used in both contexts but is particularly useful in urban areas to assess the potential of a site before full excavation. Finally, Remote Sensing is an advantageous non-invasive technique that can precede excavation in both rural and urban areas to identify sub-surface features and plan the excavation strategy accordingly.