Question

what is the scientific reason behind bird's migration​

Answer 1

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THE SCIENTIFIC REASON BEHIND MIGRATION OF BIRDS ARE THAT THEY CANNOT CHANGE THEIR TEMPERATURE ALONG WITH OUTSIDE TEMPERATURE AND WITH THE CHANGE IN OUTSIDE TEMPERATURE, THEIR BODY TEMPERATURE FLUCTUATE. HENCE , TO PROTECT THEMSELVES FROM SUCH HARSH SUMMER OR WINTER CONDITIONS, THEY GO FOR MIGRATION.

Answer 2

Answer:

they have some organs which can detect magnetic field by using them the birds travel

Explanation:

the need to them is to protect from cold and to have a good shelter