Final answer:
The broadest level of the classification system for living organisms is called the Kingdom. This system was developed by Carl Linnaeus and uses binomial nomenclature at the most specific level for the scientific naming of organisms.
Step-by-step explanation:
Of the levels listed, the top or broadest level of the classification system for living organisms is called the Kingdom.
The individual who developed the modern classification system is known as Carl Linnaeus, a seminal figure in biological taxonomy. He proposed a hierarchically structured system for classifying organisms that consists of several major categories. Starting from the broadest category to the most specific, they are: Domain, Kingdom, Phylum, Class, Order, Family, Genus, and Species. The scientific name of an organism is composed of its genus and species, a two-part naming system called binomial nomenclature. A species is defined as the most specific taxonomic category, which ideally includes organisms that are capable of interbreeding and producing fertile offspring.