Look again at Khalid's account:
• The Prophet ﷺ stated that ḍabb was not forbidden: this is something he said, or qawl (قول).
• Khalid ate while the Prophet ﷺ watched without forbidding him: this shows approval, or taqrīr (تقریر).
How to identify the feature: Look at which part of the account the question asks about. One account can report more than one feature.