Which basic geometric term can be called "half of a line"?

A. Ray
B. Vertex
C. Segment
D. Angle

Answer:  A. Ray

Step-by-step explanation:

A ray is a part of a line that starts at a fixed point and goes towards in a particular direction to infinity where as a line has no endpoints such that it goes towards infinity from both the sides.

The point where the ray begins is known as its endpoint.

Similarly as a line, ray passes through infinite points on its way in a particular direction .

Thus, the basic geometric term can be called "half of a line" is ray.