Answer:
The correct answer is B. point
Explanation:
We know that a line has a length so option a cannot be correct.
A point is represented by a dot which has no length, width and height.
A ray is formed by a collection of points which altogether make its length.
Similarly an angle is formed by two rays.
So, angle, ray and line, all of them have length, width or height.
Hence, B. Point is the right answer ..