The purpose of adding transitional phrases during the revision phase of writing is mainly?

connect ideas better.
clarify opinions more.
illustrate examples better.
emphasize arguments more.

Explanation:

Transitional phrases are expressions or words that show how thoughts, passage or areas in a content are associated, thus the peruser can without much of a stretch know in which way every thought is associated with each other and how different thoughts develop the fundamental thought in a content.  

Transitional phrases can indicate differentiate, impact, segments of an entire, among others. Accordingly, including transitional amid the correction arrange, in which the essayist read the writings and makes changes, help the writer to connect ideas better and makes the relation between ideas explicit for the reader, which makes the text easier to understand.