According to the principle of superimposition, when 2 or more waves overlap at a point in space, the amplitude of the resultant wave at that point is

Always zero

The product of the individual wave amplitude

The product of the frequencies of the individual waves

The sum of the amplitudes of the individual waves

Explanation

According to the principle of superimposition, when 2 or more waves overlap at a point in space, the amplitude of the resultant wave at that point is: The sum of the amplitudes of the individual waves.