Question

Bigger birds are unable to fly very high in the sky because of their
heavy bodies.(true or false)​

Answer 1

True,bigger birds are unable to fly due to their heavy bodies.

Answer 2

True

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.