Some feed only on other insects. Other ants love grease. Some eat seeds. Others consider human food especially satisfying. Others won't touch it.
Ants live underground in colonies.
Ants contaminate food, are unsightly and often hard to fight off once established in a home. To discourage ants, handle food items with care. Remember to clean up grease splatters and spilled food and crumbs. You can purchase baits or ant traps in your local hardware store. However, identification of the ant is very important because the baits you can buy work well for some species and not for others.