To evaluate the responses based on the expressions depicted in the images:

1. **First image:** The person seems neutral, so "I'm fine" would be appropriate. (✓)
2. **Second image:** The person looks sad, making "I'm great" an unsuitable response. (✗)
3. **Third image:** The person appears happy, so "I'm happy" fits well. (✓)

You can put a check (✓) for the first and third responses and a cross (✗) for the second response.