Explanation:

Let’s break it down:

- “Hold your horses” means relax, pause, or just wait a moment before doing something.

- Option 1: “Don’t let your imagination run”—not really the meaning here; this is more about controlling your thoughts, not your actions.

- Option 2: “Wait a moment” – You nailed it. This matches the idiom perfectly.

- Option 3: “Think before you speak”—while pausing to think sounds similar, the phrase isn’t specifically about talking, it’s about holding up before acting in general.

- Option 4: “Don’t talk rudely”—completely unrelated. This has nothing to do with manners or rudeness.

So, next time someone tells you to “hold your horses,” know they just want you to pause for a second.