Answer:
The correct answer is Mullerian mimicry.
Explanation:
Mullerian mimicry is mimicry in which 2 or more harmful animals/insects develop the same appearances for protecting themselves by protective device, the theory is that if a predator species learns to avoid 1 of harmful species of prey, it will also avoid the harmless species that mimic such appearance.
In the case of houseflies, they develop such similar appearance as the wasp but in reality, they are harmless but wasp can sting and harmful. Due to their appearance and mimicry predators also avoid houseflies
Thus, the correct answer is Mullerian mimicry.