Answer:
Option: A is correct.
A) a part of a line that has one endpoint and extends indefinitely in one direction
Step-by-step explanation:
" A ray is a line that starts at a given point and goes off for ever in some direction. It may pass through another point as it does so "
Hence, option A is correct.
( The definition of Ray is:
A) a part of a line that has one endpoint and extends indefinitely in one direction )