Plz answer the 3rd one

Dear student, Migration is the movement of birds and fishes from one place to another in search of favourable conditions for breeding and also evading the harsh climatic conditions of their natural habitats. Migration could also take place due to acute shortage of food, water, shelter during seasonal changes. There are various factors which affect the migration and give birds and animals a signal to start the process of migration. Magnetic field of the earth, position of setting of sun, position of stars etc. can be sensed by the migratory animals and hence lead to migration. Sometimes, the sense of smell can also play a role in this phenomena. The birds who migrate are Siberian crane, flamingo, falcon etc. These birds travel approximately 49,700 miles in a year. Kindly find the pictures on your own. Thanks and regards