The chief difference between primary and secondary succession is that:

a) primary succession occurs among the plants in a habitat, whereas secondary succession occurs among the animals. b) primary succession begins with no life and no soil, whereas secondary succession begins with both. c) secondary succession alters the biotic environment, whereas primary succession alters the abiotic environment. d) primary succession occurs more quickly than secondary succession. e) primary succession can occur in terrestrial and aquatic habitats, but secondary succession can occur only in terrestrial habitats