Explain the relationship between species richness, relative abundance, and diversity.

Species diversity is not only measured by the number of species present within a biological community but when measuring the species diversity two factors which are considered known as species richness, and relative abundance.

Species richness is defined as the number of species in a particular area, and species abundance defined as the number of individual per species. Maybe two communities equally rich in species, but they are different in relative abundance.

i think the answer would d

the real answer is b. scintillation counter