Body changes
Effort
Situations
Emotions
Onomatopeias
References
Environments' sounds
Experiment
God given Language
PhysicalAdaptation Source
Social Interacction Source
Pooh - Pooh
Bow - Wow
NaturalSound Source
Divine Source
Origin of language
Double articulation
Distinct words/meanings
Creativity with/Number of utterances
Utterances
Generation to Generation
Words fitting concepts
Time expressions(Past, present or future)
Duality
Productivity
Cultural Transmition
Arbitrainess
Displacement
Properties of Human Language
