Match the following based on the part that vibrates to produce a sound from the objects in column 1: 
a.  i. Vocal cords 
b.  ii. Air column 
c.  iii. String  

  1. a-ii, b-iii, c-i
  2. a-ii, b-i, c-iii
  3. a-i, b-iii, c-ii
  4. a-iii, b-i, c-ii


According to the sound and friction made, the schools can be connected with bells, the house can be connected with a mixer grinder, and the gym can be connected with speakers.

The correct answer is: a-ii, b-iii, c-i

    According to the sound and friction made, the correct matching order would be a-ii, b-iii, c-i
    • The schools have bells that produce sound by hitting that cause more vibration and friction.
    • The mixer grinders of house produce a sound with maximum friction.
    • The gyms have home theatre speakers that can produce a sound that can be increased to the maximum.