They are
And

The Study of Language Functions

It allows a human to create a variety of unique cultural identities for the products of the human language learning system.

the way a person uses language to communicate with other people.

As

Expanded language functions

more important social and cognitive developments acquired by a child who learns to think critically and solve problems

Displacement

important and expanded function of language that begins early and continues to expand throughout thinking.

Semanticity

they represent concepts that overlap to form more complex meanings

Flexibility

language function that give the possibility to solve problems with flexibility of the thinker.

Productivity

You can use language to create a variety of linguistic forms for literacy.

Redundancy

the speaker can try to use words to convey a particular meaning

Semantic relationships

based on

that human beings develop the meaning of their environment as they acquire their language learning system

As

the basic semantic relationship

is equal to:
Agent + action + object

the

semantic development allows a speaker to use language to perform a variety of practical acts

that express

social intentions which refers to the purpose of the child to communicate with another person

extended semantic relationships

allows the child to use language

for

refer to being the act of a language function

Speech acts

include rules for context, verbal and nonverbal characteristics

of the

speaker's statement and effects on the listener

And

Expanded speech acts

generate more meaning for speakers and listeners