Ants locate food by random searching. When a scouting ant finds promising food, she carries it or a piece of it back to the nest. Any workers she meets on the way become excited and rush toward the nest. The means of communication is unknown, but some ants leave scent trails that others can follow to the food source. Ants require water and will travel some distance for it if necessary.
Workers are able to bring water to the colony in their stomachs.
The best approach to ant management in the home is cleanliness. Any type of food or food particles can attract and provide food for ants. Store food in tight containers. Remove plants that can attract ants or manage aphids, whiteflies and other insects that produce honeydew. Reduce moisture sources, including condensation and leaks.