A compound sentence contains two independent clauses joined by coordinator the coordinators as as followed: for, and, nor, but, or, yet, so,
A complex sentence has an independent clause joined by by one or more dependent clauses. A complex sentence always has a subordinator such as Because, since, after, although, or when or a relative pronoun such as That, who, or which.
an idea that recurs in or pervades a work of art or literature
Studies show that daily, every 50 minutes, one person dies from a drunk driver.
So do you just need to write which one is short and which is long?!