Answer:
The competition between the same specie or between the two species for the habitat, food and other resources can lead to the movement of specie from one community to another.
Step-by-step explanation:
In a community population of one specie is continuously in competition with other specie. In this competition the fittest and the strong party wins and their growth rate increases. The other specie will become recessive in that community and their growth rate decreases.
In this situation either specie will decline in that community an deceased or it will migrate to area having low competition for the food and shelter.
This is how for the survival population of specie move from one area to other.