Wave Superposition Principle Steps:

• Recall the principle of superposition for waves: the net effect at any point is the sum of individual wave effects.
• Identify that waves are described by their displacement from equilibrium at each point and time.
• Apply superposition: displacements from each wave add algebraically at the point of overlap.
• Confirm this holds for all linear waves, like sound or light, without altering other properties.

Why B is correct:

• The principle of superposition states that the resultant displacement at a point is the algebraic sum of the displacements produced by each wave individually, as per the wave equation solution y_total = y1 + y2.

Why the others are wrong:

• A: Amplitudes are maximum displacements of individual waves and do not add directly; the resultant amplitude depends on phase.
• C: Frequencies are intrinsic to each wave's source and remain unchanged during superposition.
• D: Velocities are determined by the medium's properties and are independent of superposition.

Final answer: B