A second way to describe humpback flies' typical habitat is...

• A. Indoors around decaying vegetation
• B. Indoors around sewers
• C. Outdoors around debris
• D. Around decaying vegetation outdoors

Answer: (D)

Humpback flies are drawn to moist, decomposing organic matter, which provides both a breeding site and food for their larvae. Outdoors, they’re commonly found around decaying vegetation such as fallen leaves, rotting fruit, compost piles, and mulch—situations where organic material is breaking down and stays damp. Describing their habitat as around decaying vegetation outdoors captures this natural, outdoor breeding environment and matches what you’d observe in the field. While they can occur indoors near drains or around decaying matter inside buildings, the outdoor description around decaying vegetation is a precise, typical setting that aligns with their common outdoor activity.