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:
B. Word choice
Explanation:
If your editor keeps noticing and pointing out reppetition, then you may want to try and be more diverse woth your wording. Definetley try using different adjectives to add more detail and keep it interesting for the reader.