Name a sign of carpenter ant infestation.

A sign of carpenter ant infestation includes all the options provided. Chewed wood can indicate activity, as carpenter ants excavate wood to create nests, though they do not consume it like termites do. The presence of large black ants is a clear indicator of carpenter ants, as they are one of the most common species associated with damage to wooden structures. Lastly, sawdust-like frass, which is the material produced from the tunneling activities within the wood, can also signify that carpenter ants are present. Since each of these indicators points to carpenter ant activity, “all of the above” effectively describes the comprehensive signs of an infestation. Understanding each aspect is crucial for effective pest control strategies.