Bird flies freely in air.
Meaning: The warm-blooded vertebrate animal with feathers and wings is moving through the air without restriction or hindrance in the mixture of gases that surrounds the earth.
Choice of Words: Bird is a warm-blooded vertebrate animal that has feathers and wings. Flies means to move through the air using wings. Freely means without restriction or hindrance. In indicates a location or position. Air is the mixture of gases that surrounds the earth.
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