Answer:
The correct answer would be a two word system for naming organisms by using the genus and species.
Binomial nomenclature is a formal system of giving a scientific name to an organism.
It was given by Carolus Linnaeus.
According to this system, scientific name of an organism is made up of two components- generic name and specific epithet.
These names are generally Latin in origin and are written in italics.
The first word of the scientific name represents the genus name and second word represents the specific epithet.
The first letter of the genus name is always written in capitals while rest is written in small letters.
The genus and specific epithet are either underlined separately when they are written or they are italicized when printed. It indicates their Latin origin.
For example, the scientific name of human is Homo sapiens.