Use the figure to name five points

Hint: We can observe and know what various quantities are present. By this observation, we will be able to know what parts represent the points and henceforth we can name them.

Complete step-by-step answer:
The figure given to us is:

We can see lines, dots, and arrows throughout the figure. These are defined as:
Points: These are represented by dots and have no length, width or height. E.g. point B in the figure.
Line: It is a line from the two points which extends infinitely in two directions represented by the arrows. E.g. DB in the given figure.
Line segment: When the two points are connected with a line, the line is known as a line segment. Unlike the line, it has two endpoints. E.g. DE in the given figure.
Ray: It is basically a combination of line and a line segment. It consists of one endpoint and the other side to be infinitely long, represented by an arrow. E.g. OD in the given figure.
Now we know that to name the points we have to focus on the dot-like structures in the given diagram and these are:
D, E, O, B and C
Therefore, the five points in the given figure are:
D, E, O, B and C

Note: As the points have no dimensions of length, breadth, and height, we call them zero-dimensional. These are used to specify locations. Thus it can be noted that all the other quantities like line, rays, etc. all are named using the reference of these points only as they are location specifiers.