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-1. The act or practice of inserting standardized marks or signs in written matter to clarify the meani and separate structural units.
a. conjuntion
b. preposition
c. punctuation
d. abbreviation​

2.the writer of a literary work
a.author
b.copyrights
c.reference
d.publisher

3.the investigation or experimentation aimed at the discovery and interpretation of facts,revision of accepted theories or laws in the light of new facts,or practical application of such new or revised theories

a.thesis
b.theories
c.hypothesis
d.research

4.it means to quote by way of example,authority,or proof
a.sign
b.discuss
c.infer
d.cite

5.the exclusive legal right to reproduce,publish,sell,or distribute the matter and form of something (such as a literally,musical,or artistic work)

a.author
b.copyright
c.reference
d.publisher