Pebbles are small, rounded stones that are often found on beaches, riverbeds, and in gardens. They are typically smooth due to the natural weathering process, which involves water and wind gradually eroding larger rocks over time. Pebbles can vary in size, color, and composition, making them popular for decorative purposes in landscaping and crafts. In addition to their aesthetic uses, pebbles play a role in ecosystems. They provide habitats for various organisms, such as moss and lichens, and help with soil drainage. Pebbles can also be used in construction, as they are often incorporated into concrete and asphalt for roads and buildings.