Hi there, this question is asking you to explain why the statements listed are considered "fragments." Usually, fragments are pieces of sentences that have become disconnected from the main clause. Here, statements like "by the time I arrived" are considered fragments. A good answer to this question might be:
The statements shown are considered fragments because they do not express complete thoughts. For example, "before he chose which bedroom he wanted" is not a complete sentence, but is instead considered a fragment because it only expresses a partial thought. The same explanation can be given for all five statements.
Reflection: The writer reflects on the issue (that is, the topic they are writing about) and considers how their own experience and points of view might influence their response. This helps the writer learn about themselves as well as contribute to a better final product that considers biases.
