Answer:
Competitive exclusion
Explanation:
According to competitive exclusion principle two species cannot exist together if these species share the same habitat and resources. This principle was given by the scientist Georgy Gause.
Some plants that are growing in an area are crowded by other plants over time. The new plants use water, nutrients and the first plants are disappeared because both plant species share same resources and habitat. These two species cannot co exist and the second plant causes the disappearance of plant because of competitive exclusion.