A beam of light is made up of:

An electromagnetic spectrum, made up of several bands, is what we refer to as light. A light beam requires a variety of light rays in order to move. We'll learn about light beams and their components in this lesson.
The electromagnetic radiation of any wavelength, whether visible or not, is referred to as "light." It implies that the electromagnetic spectrum, which includes light, includes gamma rays, X-rays, microwaves, and radio waves. The visible light spectrum propagates as waves, much like all other kinds of electromagnetic energy. A directed projection of light energy emanating from a light source is referred to as a beam of light or a light.

The term "ray of light" refers to the direction or route that light follows. It is symbolised by a line with an arrow drawn on it. The collection of light rays moving in one direction is known as a beam of light.
There are several kinds of light beams:
A parallel beam of light is one in which the rays coming from different sources are parallel to one another.

A converging beam of light is one in which the rays are directed at a certain spot.

A diverging beam of light is one in which the light rays go away from the source point.

A beam of light is made up of or consisting of rays.

Hence, the correct answer is option A.