Quote:
The male Druicing Songbird is known for its elaborate mating call in the springtime. Researchers have concluded that the Druicing Songbird's mating call is actually a culturally acquired, rather than a genetically transmitted trait. Researchers base this conclusion on the fact that different local populations of Druicing Songbirds sing mating songs with different melodies and cadences.
Which of the following, if true, would most strengthen the conclusion drawn by the researchers?
To strengthen
...
![FLO – Therapy at the Club – Pre-Single [iTunes Plus M4A]](http://is1-ssl.mzstatic.com/image/thumb/Music221/v4/a4/11/88/a41188ed-0f2e-e8d5-1163-d59e373cc58c/26UMGIM30046.rgb.jpg/208x208bb.webp)
