Answer:
oxygen is composed of three stable isotopes, 16^O, 17^O, and 18^O
Skewed understanding involves the degree to which the biases inherent in the discipline’s perspective is reflected, therefore the way an author understands the issue that resulted from the author’s intentional decision or unconscious predisposition to exclude specific information that refers to the issue.
Skewed understanding is the distorted understanding of an issue in a way that it is regarded as inaccurate or misleading.
The correct answer is panicky.
The author himself says that there were a lot of things around him that made him feel nervous, or the exact word he used is - panicky. I don't know the context, however, based on this excerpt it seems that he went through something dangerous or tragic that made him feel panicky about many things around him.
