Option 1 -> Work is force times distance, so 1 Joule equals 1 Newton (force) multiplied by 1 Metre (distance).
Option 2 -> Kilogram × Metre gives units of mass times distance, not work or energy.
Option 3 -> Newton × Kilogram gives units of force times mass, which is not a standard energy unit.
Option 4 -> Newton × Second gives units of impulse (momentum change), not work done.
Hence, Option 1: 1 Joule = 1 Newton × 1 Metre -> Work is defined as force applied over a distance (W = F × d), making the Joule equivalent to one Newton of force acting through one metre of displacement -> correct