The correct answer to this question is Abstract noun. The name suggests that an abstract noun is a noun and it is. It is one of the many types of nouns. To understand an abstract noun, one must first know what a noun is. A noun is a person, place, thing, animal, or idea. Lebron James, snowflakes, and Virginia are all nouns.
A noun is abstract when it is anything that our five senses are unable to detect. Therefore, if we can not see, smell, taste, touch, or feel the noun, it is abstract. A government is one of the many examples of that, because though we know the establishment is there, it is not something one of our five senses can detect.