sentence fragment because a compound sentence and simple sentence flow much better then a fragment. Also, it can not be a run on sentence because its not continuing on and on with many commas
Answer:
Dear, (Name)
I have heard that you have been diagnosed with dengue fever. I hope you get well soon. I can't wait for you to come back and play with you.
Your Classmate, (Your name)
Winnings is the answer because you didn't put w