Ants have workers who forage out for food and supplies outside of the nest, they also have carpenters that builds the 'tunnel' system from within the nest, and the queens are the ones who develops new carpenters and workers to keep the colony alive. Regardless of characteristics, ants are very attracted to abundant food and moisture so make sure that any food and drinks are stored away in air tight containers or are in the fridge. Your trash should be disposed of properly, leaving no crumbs on spills that may attract ants into your home.