Where does the energy in waves come most directly from?

Answer 1

If you mean water waves, those are usually caused by the wind. For other waves - well, it really depends on the specific situation.

Answer 2

The energy in waves primarily comes from wind transfer. As wind blows over the surface of the water, it transfers energy, creating ripples and waves. This wind energy is converted into the kinetic energy of the waves as they travel across the water.