This soup has a spice that i cannot identify which kind of clause
a. noun
b. adjective clause or
c. adverb

The sentence This soup has a spice that I cannot identify contains a B. adjective clause.

Explanation:

Adjective clauses are dependent clauses used to modify a noun or pronoun. To do so, it will be introduced by a relative pronoun or subordinate conjunction. In this case, the adjective clause that I cannot identify is introduced by the relative pronoun that and modifiers the noun spice.

- "a nonrestrictive clause functions as a modifier to a noun (that is an object, person or concept). these clauses can be described by the following three options: it is set off by comas, it contains a subject and a verbs and it adds nonessential information to the sentence.

for example, in "here is bill gates, who confounded microsoft software company" we can identify "who confounded microsoft software company" as a nonrestrictive clause modifying the noun bill gates. this clause can be describes as a nonrestrictive clause because it is separated by a comma, it adds nonessential information to identify who bill gates is and it must contain both a subject (who) and a verb (confounded)."