How do birds learn to sing some songs?
defensive behavior
observational learning
mimicry
spatial learning

ANSWER:

Some birds learn to sing songs by observational learning.

EXPLANATION:

Defensive behaviour of birds is that helps them to stay protected from hunters and animals of prey. Many birds learn to sing songs for territorial defense. Birds communicate with each other to defend their territories and thereby stay safe. Many birds also learn to sing songs to attract their mates for the purpose of reproduction so that they can continue their species. The songs that birds sing may be same as some other birds or these may be completely unique .