Question

which shows ray xy?

Explanation:

Step1: Recall ray definition

A ray has one endpoint and extends infinitely in one direction. In ray $XY$, $X$ is the endpoint and it extends towards $Y$.

Step2: Analyze options

The first option is a line (extends infinitely in both directions), the second is a line - segment (has two endpoints), the fourth has endpoints $A$ and $B$ which is not relevant. The third option has $X$ as an endpoint and extends towards $Y$.

Answer:

The third option (the one with endpoint $X$ and extending towards $Y$)