What do you mean by desiring?
It would be C. Informal because you are suppose to start business letters with Dear (Yourname) and it's the only one that does.
It's D, where He would come first, but you wouldn't say me, or Him.
Answer:
CELL
Explanation:
Cell is called
•basic unit or all organism in BIOLOGY
•a battery in PHYSICS
•prison in SOCIAL TERMINOLOGIES
•phone or cell phone in COMPUTER SCIENCES
•a small compartment or place to store or live