The coconuts you see hanging by a string are likely placed there as part of a traditional ritual or local belief. In many tropical cultures, especially in Southeast Asia and parts of Central and South America, coconuts hold significant cultural or spiritual importance. They can be used in offerings, for protection, or as symbols of fertility and prosperity. While the specific meaning varies by region and tradition, their presence often indicates a connection to local customs, protective charms, or a simple decorative display using natural elements.