Which of the following represents the three domains of life?

The three domains of life represent the highest taxonomic rank in the biological classification system and are critical for understanding the diversity of life on Earth. The correct representation consists of Bacteria, Archaea, and Eukarya. This classification is based on fundamental differences in cellular structure, genetics, and metabolism among living organisms.

Bacteria are unicellular prokaryotes characterized by their simple cell structure without a nucleus, and they have a great variety of metabolic pathways. Archaea are also unicellular prokaryotes but differ significantly from bacteria at the genetic level and often thrive in extreme environments. Eukarya includes organisms whose cells have a true nucleus and encompass a wide range of life forms, including animals, plants, fungi, and protists.

This classification helps biologists understand the evolutionary relationships and characteristics that define life forms, making it foundational to the study of biology. The other choices do not accurately represent the major domains of life as they either group organisms based on different criteria or include categories that do not match the established biological nomenclature.