Answer: Red photons have the least amount of energy.
Step-by-step explanation:
Light is a wave. Visible ligth comprenhends a continuous spectrum of waves. Every color is light of certain frequency range. So, every color has its own range of frequencies and energies.
The visible light has these frequency ranges, which you can search in your textbook or internet:
color frequency
red 400 - 484 Hz
orange 484 - 508 Hz
yellow 508 - 526 Hz
green 526 - 606 Hz
blue 606 - 668 Hz
violet 668 - 779 Hz
From that, red photons are in the low end and violet photons are in the high end of frequencies.
The energy of a photon is directly proportional to the frequency. The proportionality constant is the Planck's constant (6.62607004 × 10⁻³⁴ m² kg / s).
From which you conclude that the red photon has the lowest energy and the violet photon has the highest energy.