How can you make a sound louder? adding more frequency

removing energy

removing frequency

adding more energy

add more energy..

hope it helps :)

BY adding more energy

Explanation:

Because by adding energy  it will cause the string/sound to vibrate more which can cause more air particles to more and longer making the sound louder.

in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.

terd muffin is the correct answer