Final answer:
Linnaeus' Systema Naturae groups plants and animals according to their similarities and differences, using hierarchical levels of classification.
Step-by-step explanation:
The Linnaean system of classification, as described in Linnaeus' Systema Naturae, groups plants and animals according to their similarities and differences. Linnaeus divided organisms into different hierarchical levels, including kingdom, class, order, family, genus, and species. These classifications are based on observable traits and characteristics of organisms. For example, organisms that share common traits are grouped together in the same genus, while similar genera are classified in the same family.