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)
Adverb for sure as mighty often refers to being strong and fierce and can only really be used to describe a movement like a mighty punch BUT it can be an adjective as mighty may be used as a mighty man etc.
Answer:
C. Sammy swirled toward the sound of an opening door, as the room suddenly filled with all his friends.
Explanation:
Narrative writing involves a character in setting and some events taking place around that character. It is also called story writing.
Option C has a characters Sammy, and his friends, it also includes a setting (room door) and narrates and event. Hence, it is an example of narrative writing.
Option A is an example of instructional writing.
Option B is a persuasive writing, persuading the audience to agree with the author and believe his point of view.