Paleontologists think that Tyrannosaurus, Sauroposeidon, and other long-extinct theropods and sauropods may have breathed using air sacs connected to tubelike extensions inside the animals’ bones. Such structures are found in modern birds, which is why some paleontologists treat the respiratory systems of birds as __________ those of Tyrannosaurus, Sauroposeidon, and other theropods and sauropods.
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Verbal·Craft and Structure·Words in Context
hardWhich choice completes the text with the most logical and precise word or phrase?
A
harbingers of
B
emissaries for
C
proxies for
D
subordinates of