Short paragraphs, un varied punctuation, the redundant use of the subjects name
This would be internal rhyme, internal rhyme is when you involve a word in the middle and at the end that rhyme :)
I think it is:
Sarah opened her drawer took out the new stationary set. Now that she has finished her chores, she can spend some time writing a letter to her friend Cade. Cade had just moved to a new city a few months ago, but Sarah felt as if he had been gone for a year. Fortunately, they both love writing letters. They even put their own creative touch, a sketch, at the bottom of each letter. They were determined that their friendship would last even if they were far away from each other.
Something like that. I hope this helps.
It's really important to know your audience when you start writing something. For example, if you want to write a dystopian novel, usually teens and young adults read such books, so you want to modify your novel and theme a bit to better suit their interest and understanding. You need to decide on which group of readers you want to write for so that you can adjust themes, motifs, characters, etc.
