Answer:
D. The area of zero population growth
Step-by-step explanation:
Competition coefficient can be explained as the degree to which an individual of one species affects through competition. It can also be described as the growth or equilibrium level of a second species' population, relative to the effect of an individual of the second species.
The Lotka-Volterra model predicts that there could be a possibility of a stable coexistence of two species, only when intraspecific competition has a greater effect than interspecific competition.
In conclusion, the competition coefficient in the Lotka-Volterra competition model resulted in zero isocline, which shows one species having a growth rate (dN/dt) of zero.