A carpel on a typical flower is located on the bud tips, what I mean is that where the stamen is nearly right beside it is the carpel. A carpel is like the reproductive organism of a flower.
In electromagnetic waves, energy is transferred through vibrations of electric and magnetic fields. In sound waves, energy is transferred through vibration of air particles or particles of a solid through which the sound travels. In water waves, energy is transferred through the vibration of the water particles.