The answer to 'why do I have ant' is that ants are common household pests that can be attracted to your home for a variety of reasons. Ants are looking for food, water, and shelter, and they often find these things in and around our homes. Some common causes of ant infestations include crumbs or spills on the floor, leaks or moisture issues, and entry points like cracks and crevices where ants can get inside.
If you're noticing ants in your home, it's important to try to identify the source of the problem and take steps to eliminate them. This may involve cleaning up food sources, sealing entry points, and using baits or other pest control methods. In some cases, you may need to call in a professional pest control technician to fully address the issue.