"7. Bird's Opening (f4)...Cons:...does nothing to develop back-row."
As a Bird player may I point out the absurdity of this "con". 1.f4 opens up f3 for the King's knight (2.Nf3 is almost always White's second move). Then you almost always play 3.e3 or 3.g3 to make room for the King's bishop on the second row. Then you castle. How is that "doing nothing to develop the back-row"? I'm not saying the Bird does not have its share of cons, but this is not one of them.
i didnt know u could move the pawn three squares 1. e2-e5
sorry for the very delayed post