W: Good afternoon, Dr. Bishop. Do you have a couple of minutes? You see, I have some difficulty with my project.
M: Sure. You have about 10 minutes before I leave for my lecture. What is your problem?
W: Our team has finished the observations of the children. Should we just put the notes down, or should we do some further research and draw a conclusion?
M: Well, first, you mentioned children. (1) What I require is to make observations of the same child at different time and different locations.
W: Oh dear! We must have misunderstood the requirement. Does that mean we must do the observations from the very beginning?
M: I'm afraid so. (2) Then, after that, what you need to do is to study your notes and see what kind of behavior is influenced by the environment and what kind of behavior is not affected. You should put your findings in the paper, and you also need to find published theories to support your conclusion.
W: Dr. Bishop, is it possible that we submit the paper a few days later, just in case that we can't make it?
M: (3) The deadline I set in the assignment is for the presentation. You may need to make some amendments before handing in the paper.
W: Presentation? What's wrong with us? No one in our team has ever mentioned the presentation. There is no way we can make the deadline!
M: (4) If everyone in your team shares the assignment, say each works on a chapter of the paper, then one takes the job of editing PPT and one prepares for the oral presentation, and if you all work hard enough, I'm sure you can make the deadline.
W: I'm afraid we don't have other choices. Thank you, Dr. Bishop.
What does the man require his students to observe?  A。