This is the 3386th most frequent Korean word.
달라고
"달라고" means "to ask for (something) to be given to oneself."
The word '달라고' is used to express that the student is asking for something (the homework) to be given to them by the teacher.
학생이 선생님에게 숙제를 달라고 했어요.
The student asked the teacher for the homework.
Here, '달라고' is used in the context of a request made by the friend, asking the speaker to give them a photo.
친구가 저에게 사진을 달라고 부탁했어요.
My friend asked me for a photo.
In this sentence, '달라고' conveys that she is asking the child to retrieve and give her the toy.