In geometry, a line is an imaginary object that goes on forever in both directions. It has no endpoints.
A line segment is a part of a line that has two endpoints. It is the shortest distance between two points on a line.
A ray is a part of a line that starts from one point and goes on forever in one direction. It has only one endpoint.
Think of a line as a long, straight road that goes on forever. A line segment is like a short part of that road between two stops. And a ray is like a one-way road that starts from one stop and goes on forever.
It's helpful to imagine these objects because they are used to understand the relationships between different points, angles, and shapes in geometry.