Question

The spindle-shaped body of birds help in flight by:

• A. increasing the air resistance while flying
• B. decreasing the air resistance while flying
• C. reducing the bird's body weight
• D. increasing the bird's body weight

Answer 1

The correct option is B decreasing the air resistance while flying

The spindle-shaped body of birds help in flight by minimising the air resistance while flying. Other adaptations which help birds in flight are:

$\bullet$ Hollow bones
$\bullet$ Feather covered body
$\bullet$ Light body weight
$\bullet$ Modification of forelimbs into wings