Answer:
He belays Hillary with rope support up the mountain which reduces the risk of Hillary from falling.
Step-by-step explanation:
This is the option that best describes the way in which Tenzing Norgay contributed to the success of the climb. In this text, Edmund Hillary describes how he and Tenzing Norgay were able to climb Mount Everest together. From his description, we learn that the climb was a team effort, and that the contributions of both characters were absolutely necessary for the success of the climb.