It seems like you need help matching the terms to their definitions. While I can't see the specific definitions, I can provide a brief description of each term that may help you select the correct answers.
1. **Challenge** - To question or dispute the validity of something.
2. **Clarify** - To make something clear or easier to understand.
3. **Justify** - To provide reasons or evidence to support a claim or argument.
4. **Verify** - To confirm the accuracy or truth of something.
If you have the definitions available, please share them so I can help you match them more accurately.