Although light from the sun appears white, it is actually made up of a lot of different colors. this portion of the electromagnetic spectrum, we call white light is referred to as within the electromagnetic spectrum.

The correct answer is "visible region".

Explanation:

Electromagnetic wave: In this wave, the direction of  electric field and magnetic field are perpendicular to the direction of the propagation of the wave. This wave is transverse in nature. It travels with the speed of the light.

For example, X-rays, gamma rays, infrared rays and visible region.

The electromagnetic spectrum consists of visible region and an invisible region.

Visible region of the electromagnetic can be seen by naked eyes. Its range is 400 nm to 700 nm.

In the given problem, light from the sun appears white. The white light consists all the colors of the rainbow. The portion of the electromagnetic spectrum is called as visible region within the electromagnetic spectrum.