a. Phonology
It’s study of organizing sound.

b. Morphology
Basically, it’s study of the construction of words from primitive meaningful units.

c. Morpheme
As we can say that it’s primitive unit of meaning in a language:

a. Syntax
In this, we have to arrange words to make a sentence. Also, involves determining the structural role of words. That is in the sentence and in phrases.

b. Semantics
It defines the meaning of words. Moreover, how to combine words into meaningful phrases and sentences

c. Pragmatics
It deals with use and understanding sentences in different situations. Also, defines how the interpretation of the sentence is affected.

d. World Knowledge
It includes the general knowledge about the world.