a) A line has infinitely many end points.
A line extends infinitely in both directions, so it does not have a specific end point. It continues indefinitely.
b) A ray has one initial point and extends infinitely in one direction.
A ray starts at an initial point and extends infinitely in one direction. It has a starting point but does not have an end point.
c) A line segment has two end points.
A line segment is a part of a line that has two distinct end points. It is a finite portion of a line, with a defined start and end point.
d) A line does not have a definite length, but a line segment has a definite length.
A line extends infinitely in both directions, so it does not have a specific length. However, a line segment is a finite portion of a line, so it has a definite length. The length of a line segment can be measured using a ruler or calculated using the distance formula in coordinate geometry.