Correct option is C
Explanation-
The Allee effect refers to a phenomenon in ecology where the per capita growth rate of a population is lower at low population densities. In the strong Allee effect, the per capita growth rate becomes negative at low densities, meaning the population may go extinct if it drops below a critical threshold.
In graph C, at low population densities, the per capita growth rate is negative. As population density increases, the per capita growth rate increases, reaches a maximum, and then decreases due to crowding or competition. This characteristic hump-shaped curve with negative growth at low density is typical of the strong Allee effect.
Incorrect Options -
Graph (A): Growth rate is flat and only drops at very high density — not indicative of Allee effect.
Graph (B): Constant per capita growth rate regardless of population — unrealistic and not an Allee effect.
Graph (D): Growth rate declines linearly with density — represents logistic growth, but not the Allee effect.
Final Answer: Option c - (C)
