What is the approximate life cycle duration of a common house fly?

The approximate life cycle duration of a common house fly ranges from 7 to 45 days, making this answer accurate. The life cycle of a house fly undergoes four main stages: egg, larva (maggot), pupa, and adult. Under optimal conditions, such as warm temperatures and ample food supply, the house fly can develop quickly, often completing its life cycle in as little as a week. Conversely, in less favorable conditions, such as colder temperatures or limited resources, the life cycle may extend up to 45 days.

This range accounts for various environmental factors that can impact development speed, including temperature, humidity, and food availability. Therefore, the choice that captures this variability and reflects the biological processes of the house fly's development is the correct one.