Answer:
Visual cues weigh more than auditory in aggression behaviour.
Step-by-step explanation:
We can deduce that the appearance of male bird model of M , shows maximum aggression. While on the other hand, the different species model appearance does not show same amount of aggression. This is because visual cues are important in mate competition. It can be used to draw distinction between Males form M, SA and GW.
Taking a look at the type of song experiment. Here, the song of males form M population elicits or shows absolute and maximum aggression compared to songs from GW. However, when we put together both song and model, the visual cues appear to be more important than auditory. The appearance of Model M and song of SA also elicits significant aggression. But when module is SA and song is M the aggression is less. So we can say that visual cues weigh more than auditory in aggression behaviour.