The taxonomic classification level that is the largest or most broad is the "domain."
The most broad or largest taxonomic classification level is the "domain." A domain is the highest level of classification in the biological hierarchy. It groups organisms into three major categories: Archaea, Bacteria, and Eukarya. These domains are based on fundamental differences in cell structure and biochemistry. To determine which taxonomic classification level is the largest or most broad, one can refer to a biology textbook or consult reputable online resources that provide information on taxonomy and classification.
