Match the definition to the term.
1 . thesis              the study of word origins
2 . main body        helped spread and develop language
3 . pentad            uninflected speech
4 . slang            rarely used in writing
5 . grammar      rules for speaking and writing
6 . trade            method of organization
7 . monotone     middle of the report
8 . etymology     Who?
9 . actor-agent         statement of direction and purpose