It is common sense to keep your instrument out of the rain.
It is common sense that there are many different genres of music.
It is common sense that music is sound.
Using some plain old "common sense" in a sentence:
If you want to play a trumpet you need to blow through it.
You need ears to hear music.
authors choose a genre based on their purpose. fiction works well for teaching a lesson, as in fables. however, presenting facts and opinions in nonfiction might be a better way to present information. when authors begin to write, they think about what they want the reader to understand or experience. while fiction may be the best genre for storytelling, nonfiction may be the most clear for sharing facts, so both genres have merits.