Question

A. Tick the correct answer.
1. Light and boat-shaped body of birds help them
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Answer 1

All birds have a boat-shaped body. Boat shaped body helps a bird while flying. Boat shaped body reduce the air pressure and reduce the drag of air while flying.

Answer 2

Your question was incomplete. Please check below the full content.

Answer:

The correct option is A) Fly in the air.

Explanation:

• When an object is travelling through a fluid, such as air or water, the streamlined body aids in reducing friction drag.
• Thus, streamlined bodies greatly aid birds in flying through the air by lowering air resistance.
• For a bird to produce lift, its wing shape is crucial.
• A longer passage of air is created by the greater speed over a curved, larger wing surface.
• This indicates that the air is moving more swiftly over the top of the wing, which lowers air pressure there and produces lift.
• Greater lift is produced by larger wings than by smaller wings.
• As a result, smaller-winged birds and aeroplanes must fly quicker to maintain the same lift as larger-winged ones.

The boat-shaped body of birds helps them to fly in the air.

Light and boat-shaped body of birds help them

A. fly in the air

B. climb on the trees

C. walk on the land

D. float in the water

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