Answer:
If you need a sentence of your own, you can use this clause <em>Which is my favorite sport</em> as a non-restrictive relative clause to give some additional information about a sport. For example,
Cycling, which is my favorite sport, has never been absent from the Olympic program.
Explanation:
A complex sentence is a sentence that contains an independent clause and one or more dependent clauses.
A dependent clause is a group of words with a subject and a verb. It does not express a complete thought, so it is not a sentence and can't stand alone.
<em>Which is my favorite sport</em> is a dependent clause as it cannot stand as a sentence by itself.
So you need to add an independent clause to have a complex sentence.
<em>Cycling has never been absent from the Olympic program</em> is an independent clause. You add your clause <em>which is my favorite sport</em> simply to give some additional information about cycling.
