I think it is the a speaker's <span>behavior</span> knowledge both of the grammatical rules of a language and of the rules for appropriate use in social contexts
Hope i helped you
If your asking what *pachyderm means.
then it means a very large animal with thick skin, like an elephant or rhino.
Answer:
Yes.
Explanation:
Being a hero, means to save someone in need. Being a leader is teaching someone to save themselves! :D