The Answer is: It is their only way out.
"Yes," replied the Professor, looking at me calmly from under his spectacles, "it is the only chance which remains to us of ever escaping from the interior of the earth to the light of day."
ANSWER:
Bob stated that the eaves that he sells are known for their legacy of being the best eaves in the world.
Hope this helps! :)
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Yes, I believe so. The two sentences in the paragraph use similar/same-ish sentence structure.