ANS:B - longitudinal

When a tuning fork vibrates, the waves produced in the fork are longitudinal. A tuning fork generates sound waves as it vibrates. These sound waves consist of compressions and rarefactions that travel through the surrounding medium, such as air. In longitudinal waves, the particles of the medium oscillate back and forth in the direction parallel to the direction of wave propagation. When a tuning fork vibrates, it compresses and expands the air molecules in front of it, creating regions of high pressure (compression) and low pressure (rarefaction) that propagate outward in a longitudinal manner. Therefore, the waves produced by a tuning fork are longitudinal waves.