The purpose of the cross-cultural investigations that tested whether human beings display similar facial expressions of emotion regardless of cultural/national differences was to demonstrate that:

Facial behavior has an innate, unlearned component.

Explanation:

The debate of nature vs. nurture is one of the most important ones in the social sciences. "Nature" states that some traits are innate to humans, and are already within us the moment we are born. On the other hand, "nurture" refers to the idea that it is society that teaches us some of our traits, and we adopt them based on our culture. What this research wants to show is that human facial behaviour has a component that is innate and unlearned.

the answer is : the nut cases won't quit battling and their recurrence of flights will going to continue as before despite the fact that the battles are less hazardous now because of their bills have all of a sudden been blunted.   in the falcon dove diversion, two creatures will drive towards one another to crush one another, among the two one will win and other will swerve. in this way, clearly, the battle will be dependably there between two creatures for the assets or mate.