Well, it represents the 3 main agricultural crops from various Native American cultures that have lived throughout North America. The 3 crops are corn, beans and squash and were always grown very close to each other in an agricultural technique called companion planting. Each crop while being grown has tremendous benefits for the other crops.
For instance, the corn’s structure gives the ability for the beans to climb so no poles are needed. The squash grows low to the ground protecting the soil from getting weeds by blocking out the sun. Ok I’m sure that’s more than you asked for but wanted to make sure you knew where I was coming from.