Answer:
Noun clause.
Explanation:
In English language, a noun can be defined as a word used to refer to a person, place, animal, idea, feeling or thing. Therefore, a noun is considered to be a naming word.
Also, a clause can be defined as a group of words that comprises of both a subject and predicate (finite verb).
A noun clause can be defined as a dependent clause which acts as a noun by taking its place in a sentence.
Generally, noun clause begins with a subordinating conjunction such as how, when, where, what, etc.
The underlined part of the statement "What most skateboarders love is an isolated road with a steep incline" is a noun clause.
