Syntax

Human capacity for language has a g（）basis, but the details of language have to be taught and learned.

A scientific study of language is based on what the linguist thinks.

D（）is one of the design features of human language which refers to the phenomenon that language consists of two levels: a lower level of meaningless individual sounds and a higher level of meaningful units.

A diachronic study of language is the description of language at some point in time.

Phonology

Semantics

Phonetics

Linguistics

Social changes can often bring about language changes.