In both inference and observation, you have to monitor or observe something.
Here's one example, you can build on it:
Sherlock Holmes 'observed' the scene below him.
His 'inference' was based on the evidences given to him.
Here's the definition of both of them...
the action or process of closely observing or monitoring something or someone is called observation.
a conclusion reached on the basis of evidence and reasoning is inference.
Answer:
C. by providing Julie with something she gets complimented on
Explanation: I got it right on the test
Answer: She is worried about the well-being of her son among an angry group
Explanation:
Sally's point of view told by the excerpt is that "she is worried about the well-being of her son among an angry group".
This can be deduced when she spoke in a whisper, after she noticed how angry and antagonised the crowd was when she told her son not to speak the way he was speaking.