Composition
Writing, Essay
noun, する verb
When you make writing, what are you doing? Simply put, you're writing. If you want to be fancier about it, you could say this is composition.
さくぶん
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
この作文を、中川先生にわたしてください。
Please hand this essay in to professor Nakagawa.
作文のテストで百てんをもらいました。
I got 100 percent on the essay exam.
僕の作文は、まだ間違いだらけです。
My essays are still full of mistakes.