Question

If aeroplane is not made in the shape of birds what happens

Answer 1

a plane is made as similar with bird because of the concept " streamlining "

if aeroplane is not in the shape of bird , then no aeroplane exists.

Answer 2

aeroplanes have streamlined shape to reduce the effect of air pressure / air friction and drag . As friction might result in damaging aeroplane body and heat it which is not safe.
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