Locate the subordinate clause in the following sentence, and identify it as a noun, adjective, or adverb.

i had root beer in my cereal this morning because i forgot to buy milk.

A subordinate clause is defined as the clause that needs the independent clause because it does not convey a complete thought. Based on the given sentence above, there is no subordinate clause, since the sentence is an example of a compound sentence having two independent clause connected by the coordinating conjunction "because". Hope this answer helps.