Scientists believe that birds may have developed from...
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Amphibians
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Dinosaurs
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Mammals
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Arthropods
B
Correct answer
Explanation
Birds evolved from theropod dinosaurs during the Jurassic period, specifically from the maniraptoran group. This evolutionary relationship is supported by numerous fossil discoveries including Archaeopteryx and many feathered dinosaur species. Birds share anatomical features with dinosaurs including hollow bones, wishbones, and scaled legs.