Transverse and mechanical
Longitudinal and mechanical
Transverse and non-mechanical
Longitudinal and non-mechanical
The correct option is B Longitudinal and mechanical
Answer is B.
Sound is a mechanical wave that is created by a vibrating object. The vibrations of the object set particles in the surrounding medium in vibrational motion, thus transporting energy through the medium. For a sound wave traveling through air, the vibrations of the particles are best described as longitudinal. Longitudinal waves are waves in which the motion of the individual particles of the medium is in a direction that is parallel to the direction of energy transport.
Hence, sound is a longitudinal and mechanical wave.