Answer:
Push Factor "push" people away from there homes and include things like war, so they make people leave there homes because for e.x war.
Pull Factor "pull" people to a new home that include things like better opportunities.
Step-by-step explanation:
I think the best answer would be the deciding agents in what causes immigrants to move.
Like for e.x high unemployment is a common push factor, while plenty of jobs is a pull factor.