Answer:
1.)Authors often vary the types of phrases and clauses that they use in order to add interest to their writing.
Step-by-step explanation:
This is the statement that is best supported by facts about the way of writing of most authors. Authors usually vary the types of phrases and clauses that they use in their writing. This is done in order to attract the reader and avoid making a text too monotonous. By adding variety to a text, you ensure that your text remains interesting and that the reader continues reading it until the end.