Answer :
If you had a given sentence:
"James could not eat because he was feeling ill."
"Because" is acting as a subordinating conjunction. A subordinating conjunctions will combine two independent clauses into one sentence, making it a complex sentence.
"James could not eat because he was feeling ill."
"Because" is acting as a subordinating conjunction. A subordinating conjunctions will combine two independent clauses into one sentence, making it a complex sentence.