Inviting and familiar, is what I would say. It's an odd question with odd answers.
Answer: Native Americans and Australlian Aborigines.
Explanation: Sign language was generally used in the hunting culture so they could communicate without speaking so that way either other people in the woods or the animals wouldn't hear them. Hope this helps!!!
Reviewing the spelling words
Knowledge
* I think but i'm pretty sure Sorry if it didn't help i tried my very best