Question

the level of the linnaean taxonomy in which different species are grouped together on the basis of their similarities to one another is called a
○ category.
○ class.
○ taxon.
○ genus.

Explanation:

In Linnaean taxonomy, a genus is a taxonomic rank where different species with similar characteristics are grouped together. A "category" is too general, a "class" is a higher taxonomic rank (above order, family, etc.), and a "taxon" is a general term for any taxonomic unit (could be any rank like species, genus, class). So the correct term for grouping similar species is genus.

Answer:

D. genus (assuming the options are labeled A to D as: A. category, B. class, C. taxon, D. genus)