Explanation:

- A pause between the acts of a play is a break or interval typically used for set changes or intermission. It can be succinctly described with one word.

- Option 1: Interlude

- Correct Answer: An interlude is a period or event that comes between others; in the context of a play, it refers to the time between acts.

- Option 2: Interlace

- Interlace means to weave or twist together. It is unrelated to the concept of a break between acts.

- Option 3: Interlink

- Interlink means to connect or associate. It doesn’t refer to pauses in a sequence of events.

- Option 4: Interline

- Interline generally involves writing or inserting between lines, which is not relevant to the context of a play.