Question

Ostriches are classified as birds but cannot fly. Why?
a. They have thick feathers
b. They have heavy weight
c. They are afraid of heights
d. They prefer to be in land

Answer 1

Answer:

b)they have heavy weight

Explanation:

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.

Answer 2

Ostriches cannot fly because they have heavyweight (option b).

• Ostriches come from the family of ratites which have characteristic features.
• This group of ratites evolved from dinosaurs and adapted to living on land.
• They adapted in a way that they do have feathers but devoid of keel segment in their breastbone which supports to fly.
• They also have huge bodyweight and are therefore called the heaviest bird.
• Their feathers are small to thrust their entire body weight and are only used for balancing purposes.
• Hence, ostriches are birds though they cannot fly.