The answer to your issue is A
The prepositional phrase " on the park bench " acts as an adjective phrase....it is describing the man...it is answering the question " which man "...the one on the park bench.
A simple sentence contains one clause, which just means one subject one verb. She runs. Go. Freddie happily walked. A compound sentence includes two or more independent clauses. An independent clause is a clause that doesn't need another clause to make sense. For example: Sally eagerly jumped up and down, and George anxiously waited for the surprise. Sally eagerly jumped up and down. George anxiously waited for the surprise. Both of these clauses make sense by themselves, and that makes them independent. A compound sentence also includes FANBOYS (for, and, nor, but, or, yet, so) with a coma. A complex sentence has at least one independent clause plus at least one <span>dependent clause with the use of a subordinating conjunction. One of the most popular subordinating conjunction is because, and it can be used in the beginning or middle of the sentence.
I hope this helped! If you don't understand something, just send me a message/</span>
