WAEC - Biology (2018 - No. 35)
When large numbers of organisms share limited space and resources, the immediate result is
extinction
emigration
competition
immigration
הֶסבֵּר
Competition in a territory is as a result of a hassle for the available resources within the territory. For instance, when the water in a river seems to be drying out, the organisms in the water begin to compete for the water.