Question

what part of the electromagnetic spectrum is the only part that can be seen by humans? visible light radio waves x - rays

Explanation:

Visible light is the portion of the electromagnetic spectrum that the human eye can detect. It consists of different colors (red, orange, yellow, green, blue, indigo, violet), each with a different wavelength. Radio waves have much longer wavelengths and are used for communication (e.g., radio, TV). X - rays have very short wavelengths and high energy, used in medical imaging (e.g., X - ray machines).

Answer:

visible light