Wave 1 carries more energy than Wave 2. Wave 3 carries more energy than Wave 2. Keeping speed constant, the greatest amount of energy is carried by a wave with

The greatest amount of energy is carried by a wave with the largest frequency.

Explanation:

velocity = frequency X wavelength

If the three waves moves with the same t the speed of light, then those with the largest frequency have more energy.

That is to say, a wave with a higher frequency and a lower wavelength will have the highest energy.