Answer: This sentence is a complex sentence, because it contains several subordinate clauses, dependent on the independent clause.
Explanation:
The <u>independent clause</u> in this sentence is:
<em>My friend (...) gave me some living room furniture</em>
<u>subordinate clause:</u>
(...) <em>who has recently moved to Michigan</em> - depends on the main clause (characterizes "the friend")
<u>subordinate clause:</u>
<em>(...)to join his family</em> - indicates why the friends moved to Michigan
<u>subordinate clause:</u>
<em>(...) that I know will be used immediately</em> - described the furniture = one that will be used immediately
