Question

of electromagnetic radiation is visible to the human eye. all a narrow portion the white color the dark color

Explanation:

The electromagnetic spectrum encompasses a wide range of wavelengths. Only a small, specific range (a narrow portion) of this spectrum, known as the visible light spectrum (approximately 400 - 700 nanometers), can be detected by the human eye. "All" is incorrect as most electromagnetic radiation (like radio waves, X - rays) is invisible. "The white color" and "The dark color" are not accurate descriptions of the portion of the electromagnetic spectrum visible to the eye; white is a combination of visible light wavelengths, and dark is the absence of sufficient light.

Answer:

B. A narrow portion