Answer:
1. push factor
2. pull factor
3. push factor
4. pull factor
Step-by-step explanation:
Push and pull factors are the factors that influence the process of migration. Some of the major factors are by forceful means and by attracting the migrates for migration. Push factors involve forceful methods and issues related to the country of migration. Pull factor is the attractive factor. The country in which the migrants wants to migrate comprises of more beneficial aspects than the later ones. They are attracted and therefore wish to migrate to the same.