On page 100, make a statement about the relative location in approximation to each other of the haves and the borrowers.
I think that what I would say about this (I am assuming that you have the same edition of the book I do and you are supposed to be looking at Table 5.1) is that the "haves" (areas where domestication arose independently) are widely scattered while the "borrowers" are clustered on various edges of a circle. This makes sense because, as Diamond goes on to point out, the three known "borrowers" all got their "founder crops" from the same place. If three places all get their influence from the same place, those three ought to be near to one another.
If you look at the 5 places that are certain "haves" they are in the Middle East, China, Mesoamerica, the Andes, and the Eastern US. These are all pretty far apart or (like Mesoamerica and the Andes) have serious barriers between them.
By contrast, Western Europe, India and Egypt can be imagined as on a circle. If you draw a circle through those places, the Fertile Crescent (Iraq, etc) is right in the middle, ready to spread its founder crops to those other three areas.