Question

which one is a ray?

Explanation:

Step1: Recall ray definition

A ray has one - endpoint and extends infinitely in one direction.

Step2: Analyze options

We need to visually check which option has one endpoint and extends infinitely.

Answer:

(Without seeing the actual visual options, we can't give a specific letter - but if we assume we could see them, we'd pick the one that fits the ray definition). If we had to guess based on the format of the question, we'd need more visual details to accurately say A, B, C, or D.