What does Lexicology, a brunch of linguistics study?

The conversion, derivation and composition are....

1. 
   the productive ways of word-building.
   
2. 
   the productive ways of producing new words.
   
3. 
   the productive ways of forming new meanings.
   
4. 
   the productive ways of developing the language.
   
5. 
   tire productive ways of forming the vocabulary.
   

14. 
    All morphemes are subdivided into two large classes:.... and....
    

1. 
   stems and roots.
   
2. 
   roots and suffixes.
   
3. 
   suffixes and affixes.
   
4. 
   roots and affixes.
   
5. 
   prefixes and affixes.
   

15. 
    The process of affixation consists in coining a new word by....
    

1. 
   deriving words from different languages to some root morpheme.
   
2. 
   adding a suffix to some root.
   
3. 
   addmg a stem to some root.
   
4. 
   adding an affix to some root.
   
5. 
   addmg some endings to some root.
   

1. 
   .... consists in making a new word from some existing word by changing the category of a part of speech.
   

1. 
   Derivation.
   
2. 
   Composition.
   
3. 
   Affixation.
   
4. 
   Conversion.
   
5. 
   Fomiation.
   

17. 
    This type of word-building consists in producing a new w ord by combining two or more stems.
    

1. 
   It is conversion.
   
2. 
   It is composition.
   
3. 
   It is affixation.
   
4. 
   It is derivation.
   
5. 
   It is shortening.
   

17.