Question

What a meaning ?
1.greeting
2.leave taking
3.introduction.
tolong di bantu ya dan di jelaskan thkxx

Answer 1

1. greeting expression is an expression that we use when you meet someone. 
example: good morning, good afternoon, how are you?, how do you do?

2. leave taking or parting is an expression that we use when we left someone.
example: good bye, nice to meet you.

introduction is an expression that we use to introduce ourselves or someone