Explanation:

- Let's explore the meanings briefly:

- Fuse: To join or blend to form a single entity.

- It's commonly used to describe melting things together or combining ideas.

- Analyzing the options:

- Option 1, correct: This term doesn't give clear meaning to relate to "fuse."

- Option 2, break: This is opposite in meaning to fuse, which is about combining or melting.

- Option 3, unused: This word doesn't relate to the concept of joining or combining.

- Option 4, combine: This word means to unite or merge, directly synonymous with "fuse."

Your answer is spot on.