Concept:A line segment is a part of a line that has two fixed endpoints.Explanation:A line segment cannot be extended indefinitely in either direction. It has a fixed length between its two end points. Option A describes a line (infinite both sides). Option B describes a point (a dot). Option D describes a ray (one endpoint, goes endlessly). Only option C correctly defines a line segment.Answer:Option C: Is a part of line having two end points.