Writing a novel is hard work. not only is the act of writing difficult, but there are many different rules to master. some rules include writing dialogue, learning to write in scenes, and developing characterization and plot. once a writer masters, or at least learns, those rules, he or she can then use them as a foundation when working on a novel.
which is the main idea of this paragraph?

there are many different rules to master when writing a novel.
once a writer learns the various fiction techniques, he or she can use them as a foundation to write.
writing a novel is hard work.
a writer needs to master writing dialogue, scenes, characterization, and plot.