What does Lexicology, a brunch of linguistics study?

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. 
   Formation.
   

16. 
    This type of word-building consists in producing a new word by combining two or more stems.
    

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

16. 
    What three aspects of composition are there in the English language?
    

1. 
   They are grammar, neutral and syntactic.
   
2. 
   They are syntactic, morphological and linguistic.
   
3. 
   They are simple, neutral and morphological.
   
4. 
   They are compound, simple and neutral.
   
5. 
   *They are neutral, morphological and syntactic.
   

16. 
    What are the four types which represent the main structural types of Modern English words?
    

1. 
   root words, derivatives, compounds and international words.
   
2. 
   root words, derived words, loan words and shortenings.
   
3. 
   *root words, derived words, compounds and shortenings.
   
4. 
   compounds, shortenings, homonymsand root words.
   
5. 
   shortenings, loan words, synonyms and root words.
   

16. 
    What is the common word for such terms as "set expressions, fixed word- groups, set phrases"?
    

1. 
   Collocation.
   
2. 
   Unit.
   
3. 
   * Phraseological unit.
   
4. 
   Set word-group.
   
5. 
   Phrase group.
   

16.