The most broad taxonomic classification level is the domain.
The taxonomic classification level that is the most broad, or highest, is the "domain". A domain is a fundamental category in biological taxonomy that groups organisms based on their cellular composition, structure, and evolutionary history. It is the highest level of classification and represents the broadest category of living organisms. To determine which taxonomic level is the most broad, you can refer to a reliable source such as a biology textbook or a reputable scientific website that provides information on taxonomy.
