Opening lines for attack
Your pieces are stronger when they stand on open lines.
White has a lead in development but the lines of his queen, rooks and bishop are blocked either by his own d-pawn or Black's e6-pawn.
Lines become open when pawns are exchanged, so ... White plays d5
Open lines lead to mate. White's rooks power down the centre while the bishop supports at long range.
🙂 Video: Attacking miniature game (3:13 min)