Subject :ICSO Class : Class 4
Subject :ICSO Class : Class 7
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Subject :ICSO Class : Class 4
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Subject :ICSO Class : Class 2
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Subject :ICSO Class : Class 7
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Subject :ICSO Class : Class 4
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Subject :ICSO Class : Class 6
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Subject :ICSO Class : Class 5
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Class : Class 5
Feathers covering their body . Wings with powerful muscles.Hollow to reduce body mass
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Class : Class 7
The bodies of birds are adapted for flying. Many of a bird's bones are hollow which makes birds' bodies lightweight. Flying birds have large chest muscles that move the wings. Birds have feathers that help them fly.
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Subject :ICSO Class : Class 3