What does the squash do in the 3 sisters?

In the "Three Sisters" planting method, squash plays a crucial role by providing ground cover that suppresses weeds and retains soil moisture. Its broad leaves create a protective canopy over the soil, helping to keep it cool and reducing evaporation. Additionally, the prickly vines of the squash deter pests, benefiting the other sister plants—corn and beans—by creating a more balanced ecosystem. This symbiotic relationship enhances overall crop yield and health.