Use your brain power:
What structures in the sitar help to produce higher or lower pitched sound?

Answer

Sitar has two structures, one is a gourd-shaped and other is long neck. The free end at the upper side of long neck has many nails to roll the string. Seven strings are attached from the nails to the gourd. There are members below these strings. The tension in the strings can be increased or decreased by adjusting the nails. With the help of these structures, the higher and lower pitched sounds can be produced from the sitar.