"I send a letter to my friend."
Translation:저는 친구에게 편지를 보냅니다.
Why is 'my' not translated here? Because when I add 내 to the sentence it's not correct.
The "my" is missing in the accepted answer. If you hover over "to my friend" it shows some form of my in all three options but if you put any of them the answer is not accepted.