What size is the moth fly, and where is it commonly found?

The moth fly, also known as the drain fly, typically measures about 1/16 of an inch in length and is commonly found in areas where organic matter is present and moisture accumulates, such as drains. This small size makes the moth fly not very noticeable, but it can become a nuisance if breeding occurs in or around damp areas where food debris or organic material is present.

Their preferred habitats, especially drains, provide a conducive environment for laying eggs and feeding, making option B particularly accurate. It highlights both the size and the specific location where these flies are usually found, aligning well with their behavioral patterns and ecological requirements. Understanding the characteristics and preferred habitats of pest species like the moth fly is essential for effective pest control measures.