Answer:
Species accumulation curve that had leveled off
Step-by-step explanation:
Species accumulation curves show the rate at which new species are found within a community and can be extrapolated to provide an estimate of species richness.
The order in which samples are included in a species accumulation curve will influence the overall shape. A smooth accumulation curve can be produced by repeating a process of randomly adding the samples to the accumulation curve and then plotting the mean of these permutations.