<u>The Correct Question is -</u>
As used in line 55410, challenged most nearly means-
They jumped up like popcorn, he stated, describing how they might flap their half of-fashioned wings and take short hops into the air. So when a group of graduate students challenged him to come up with new records at the age-antique ground-up-tree-down debate, he designed a challenge to look what clues would possibly lie in how toddler recreation birds discovered to fly.
This announcement explains he receives stimulated that how half shaped wings and take brief hops and fly into the air. when he become given a venture for age vintage ground up tree down debate with the aid of graduate students. This challenge was taken by way of him as a dare and he designed a new venture how infant birds learn how to fly.
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