Concept:Personal letters use an informal and friendly tone.
Explanation:Personal letters are written to close friends or family members.
They express emotions, feelings, and personal experiences naturally.
So the language is casual and conversational.
Formal and dignified language is used in official letters.
Accurate and precise language is needed for academic or technical writing.
Intimidating and informal language should be avoided in all correspondence.
Answer:Option A - casual and conversational.