This clause is a noun clause because Wendy is a noun.
Step-by-step explanation:
A noun clause is a needy condition that goes about as a thing. Thing provisions start with words, for example, how, that, what, whatever, when, where, regardless of whether, which, whichever, who, whoever, whom, whomever, and why.
Noun clauses can go about as subjects, direct items, circuitous articles, predicate nominatives, or objects of a relational word.