What type of insects does the family Formicidae include?

The family Formicidae is well-known for including ants, which are social insects characterized by their complex social structures and behaviors. Ants play a crucial role in many ecosystems, and they can be found in various habitats around the world. They exhibit fascinating behaviors such as cooperative foraging, building intricate nests, and establishing colonies, which can vary in size and organization.

The other options do not pertain to the family Formicidae. Moths belong to the order Lepidoptera, which consists of insects that undergo metamorphosis from larval forms into winged adults. Beetles are part of the order Coleoptera, making them a completely different group characterized by their hardened forewings. Flies belong to the order Diptera and are known for their distinct two-winged structure. Understanding these classifications helps clarify why the correct answer to this question is specifically ants.