Some push factors of human migration:
Push factors are factors that push people AWAY from a country
War - war is never a good thing, people want to find a better place to live
Environmental problems - huge forest fire, hurricane, volcano eruptions,etc.
Pull factors are factors that ATTRACT and make people want to come to a country
Education - good education = better future
Weather and Climate - some people prefer certain types of climates, they look specifically for countries that meets their living conditions
Tourist Attractions - cool places to explore and make memories
Hope this helps :)