"And the Echos jump, and tinkle, and swell.
Answer: A
Explanation:
Because the word inference means "a conclusion reached on the basis of evidence and reasoning." This means that when the question asks the process of gathering objective information you would make inferences. Summarizing is when you give/tell the overall idea or the point of a text someone/something. Making observations is almost the same so if this is wrong it is probably D.
The answer for this question is b