I would say it's the Historian because they study history or the past and have to interpret it so they can figure out how to teach it or stop it from happening again.
Answer:
B. The walker will not get tired as fast.
Explanation:
Based on the given passage, it is narrated that new electric backpacks which could be used as generating sets to power up electrical appliances were available and the up and down movement of the backpack acted as the generator.
From paragraph 4 of the given passage, it is said that the up and down motion reduces the weight of the pack.
Therefore, the detail that should be added to it is that the walker will not get tired as fast.
All of them are used but I don't think a handwritten signature is vital
Relating to, denoting, or preserving the character of an early stage in the evolutionary or historical development of something.
