Im not 100% sure but i think it is d
Answer: I believe it would be letter (b)
Explanation: I had to answer this question yesterday and I am pretty sure this is the answer. Because it asks ¨the narrator gives an example of why oxygen is vital to climbers on Mt. Everest. How does the narrator develop this concept in the rest of the narrative?¨ so this is really the only plausible answer regarding the question.
Answer:
I'm a twin so a fraternal twin are twins that don't look similar and identical twins are twins that look the same!:0 ahahhah
Explanation: