The loudness or softness of a sound is basically determined by its:

Correct option is C

Ans. (c)
Sol. The loudness or softness of a sound is determined by its amplitude. A larger amplitude results in a louder sound, while a smaller amplitude results in a softer sound.
Explanation of each option:
· (a) Phase – Refers to the position of a point in the cycle of a waveform, but it does not determine the loudness of sound.
· (b) Time period – Refers to the duration of one cycle of a sound wave, not related to loudness.
· (c) Amplitude – Correct answer. The amplitude of a sound wave determines its loudness.
· (d) Oscillation – Refers to the back-and-forth movement of particles in a medium, but it's not the direct factor for loudness.