This sentence is complex because it contains multiple independent clauses joined together by a conjunction (and). Each independent clause can stand alone as a complete sentence, but when joined together, they create a more complex sentence structure.
u rong the right answer is compound-complex.
I apologize for the error in my explanation. You are correct that the sentence is compound-complex, as it contains both multiple independent clauses (Heung Bu took the bird home, he caught some flies for the swallow to eat) and a dependent clause (While he forgot his work). Thank you for pointing that out.
