Question

why do fightless birds cannot fly ? ​

Answer 1

Answer:

flightless birds cannot fly because because of their weight.....

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Answer 2

Answer:

Ostriches, emus, cassowaries, rheas, and kiwis can't fly. Unlike most birds, their flat breastbones lack the keel that anchors the strong pectoral muscles required for flight. Their puny wings can't possibly lift their heavy bodies off the ground.

Explanation:

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