Even among fast animals, top speeds can vary significantly. For example, the quarter horse can run up to 89 kilometers per hour (km/hr), whereas the white-throated needletail swift is much faster, flying up to 169 km/hr. This difference is largely because the features that are for running on land restrict top speeds more than the features needed for flying through the air.
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Verbal·Craft and Structure·Words in Context
mediumWhich choice completes the text with the most logical and precise word or phrase?
A
trivial
B
essential
C
challenging
D
approved