The group most likely failed to ask **What tasks need to be completed?**
The group members were excited to be done with their project, but they realized that they were still missing two photographs for the web page. This suggests that they did not have a clear understanding of all the tasks that needed to be completed in order to finish the project. If they had asked themselves this question, they would have been able to identify the missing tasks and make sure that they were completed before the project was due.
The other options are not as likely to be the question that the group failed to ask. The point of the project, the audience for the project, and the goal of the project are all important questions to ask, but they are not as likely to be the reason why the group was missing two photographs for the web page.