Which object is vibrating when the following sounds are produced?
(i) The sound of a sitar
(ii) The sound of a tabla
(iii) The sound of a tuning fork
(iv) The buzzing of a bee or mosquito
(v) The sound of a flute

(i) Stretched strings of sitar are is vibrating when the sound of sitar is produced.

(ii) Stretched membranes of tabla vibrate when the sound of a tabla is produced.

(iii) Prongs of a tuning fork vibrate when the sound of a tuning fork is produced. 

(iv) Wings of mosquito or bee vibrates when the buzzing of a bee or mosquito is produced.

(v) Air columns in flute vibrate when the sound of a flute is produced.