How ants leave trail?

Ants leave a trail by secreting a chemical substance called pheromones from glands in their bodies. When an ant finds food, it lays down a pheromone trail back to the nest, which other ants can detect and follow. This chemical communication helps coordinate foraging and directs other ants to the food source. As more ants follow the trail, they reinforce it with additional pheromones, making it stronger and more noticeable.