Which of the following insects can damage wood?

Termites are well known for their ability to damage wood because they have a diet primarily consisting of cellulose, which is found in wood. These social insects live in colonies and can cause significant structural damage to homes and buildings by tunneling through wood products, including beams, flooring, and siding. The destruction they cause can compromise the integrity of a structure, leading to expensive repairs if not detected and managed promptly.

Other insects mentioned do not typically cause damage to wood. Spider mites are primarily pests of plants, feeding on the sap of leaves rather than wood. Fungus gnats, usually associated with damp soil and houseplants, do not have a direct impact on wood. Leafcutter ants, while notable for their ability to cut leaves and other plant material, do not specifically target wood for consumption. Understanding the behavior and habits of these insects highlights why termites are a significant concern for anyone involved in construction or home maintenance.