You are trying to gain sensitivity to aligned pieces on files and ranks and diagonals. This time you naturally see the king and two other pieces clustered here on the fifth rank. You also see that White has two rooks on the b-file. Neither of these facts leads to anything decisive yet, though, particularly since the bishop and rook both are protected by pawns. So look harder at the Black king’s lines and see that his rook on c2 is aligned with it. Once more the key fact is that the rook is loose, making it more vulnerable than Black's other pieces to tactical strikes. Is White in position to conduct operations on the c-file? Yes; not only does he have rooks ready to move there, but one of them is behind Black’s king, which is out toward the middle of the board where skewers most easily can occur. In fact White could play Rc8 right now and win Black’s c2 rook a move later if Black didn’t have a pawn on c6. How to eliminate the pawn? The usual way: take something it protects. Here it guards Black’s bishop and rook but only has exclusive responsibility for the bishop. So White plays Rb3xB+. If Black recaptures with c6xR, the c-file has been simplified and White now has Rc8+, skewering Black’s king and rook and winning a piece. (He trades a rook for a rook and a bishop.)