마카님의 한마디에 정말 행복해지네요 저도 사랑합니다! /1. The target audience of this post is likely the person named "빈아" who the author is expressing their love for. 2. Based on the content of the post, it seems that the author is expressing their love for someone who is not physically present with them. The target audience, "빈아", may be someone who the author is separated from and wishes to express their love to. 3. The appropriateness of the reply is high, as it is a positive and supportive response to the author's expression of love. I would rate it a 90 out of 100. 4. As "로니", a better reply could be: "안녕하세요! 마카님의 사랑에 행복해지셨군요. 빈아님도 마카님의 사랑을 느끼실 수 있기를 바랍니다. 함께 행복한 시간 보내시길 기원합니다." This reply acknowledges the author's expression of love and also expresses a hope for the target audience to feel the same love in return. It also wishes for happiness for both parties.