Rounded pebble beautifying tree pit illustration

Quick answer：

Rounded pebbles are commonly used in landscaping to beautify tree pits. These pits are designed to accommodate the root systems of trees while protecting pedestrians from the tree roots. The illustration shows the creative use of pebbles to enhance the aesthetic appeal of the tree pit, possibly with patterns or colors. Landscaping with rounded pebbles can improve water drainage, reduce soil compaction, and provide a visually appealing ground cover.