Again both enemy rooks—this time the White ones—are loose. Black’s queen can't attack them at the same time, but it can go after one of them with Qd3; so if he could create another target reachable from that position he would have a working fork. The rook on e1 cries out to be drawn forward with an exchange—such as Bxe2. If White replies RxB, now both rooks still are loose and can be attacked with Qd3. (White’s best bet is not to recapture Black’s bishop; if he does and then finds himself forked, his most favorable option is Rxe6, at least using one of his rooks to take a pawn on the way down.)

By the way, notice the predicament faced by Black’s g4 bishop at the outset here. It's under attack and almost has nowhere to go. If it were to retreat to h5, White would have g3-g4 and would win the piece a move later; if Black instead were to play Bf5, White again traps the bishop with e2-e4. Fortunately for Black he has this other “out” of Bxe2, leading to a queen fork. But you can learn from this near-catastrophe for Black by studying the g4 bishop and the Black pawns behind it. This is a classically poor position for a bishop: its lines of retreat blocked by its own pawns and by the edge of the board. When you see an enemy bishop so positioned, realize that it may be unusually vulnerable to attack.