This refers to an image depicting river pebbles arranged on a lawn. River pebbles are smooth, rounded stones found in riverbeds, often used for decorative purposes in gardens and landscapes. They are commonly used in landscaping to create pathways, borders, or as mulch. Lawns are areas of land covered with grass, typically found in gardens or parks. The image might be showcasing a creative arrangement of river pebbles on a grassy lawn for aesthetic appeal.