Natural selection has favored the ability to have culture, because many of these actions have to do with skills.
The answer is very simple. How much there is to eat.
That way they made the intruder even more aware that they were annoyed.
We expect an animal to socialize if they can.
Those who have the most skills are the coolest.
I use a phone and a computer every day, taking advantage of what humans before me created. I could not have created those tools on my own.
Ape cultures are real. I think it's time to stop doubting that they exist.
This is our last chance. You cannot recreate cultures.