Which term describes a grouping of similar organisms that can include multiple species?

The term that describes a grouping of similar organisms that can include multiple species is "Family." In biological classification, a family is a higher taxonomic rank that groups together related genera (plural of genus) that share certain characteristics and evolutionary traits. Each family can encompass several genera, each of which can contain multiple species.

For example, the family Felidae includes various genera such as Panthera (which includes lions and tigers) and Felis (which includes domestic cats). This hierarchical structure reflects the relationships between organisms, where a family groups organisms that are more closely related to each other than to those in other families.

While the genus also includes multiple species, it is a step lower in the classification hierarchy, encompassing only a particular category of closely related species. Species denotes the most specific classification and typically refers to a single organism type rather than a group of organisms. Order is another level of classification above family and includes multiple families, and therefore is broader in scope.