Earth retention refers to the methods and structures used to hold back soil and prevent erosion, especially in construction and landscaping projects. This is crucial for maintaining the stability of slopes and preventing landslides. Common techniques include the use of retaining walls, soil nails, and geogrids. These systems are designed to support vertical or near-vertical soil surfaces, allowing for the safe construction of buildings, roads, and other infrastructure. Proper earth retention helps manage water drainage and reduces the risk of soil movement, ensuring the longevity and safety of the structures built on or near these areas.