Answer: The main idea of the story of the year is ,
The answer is, "Subordinate clause."
A subordinate clause is also known as a dependent clause, which is the opposite of an independent clause. An independent clause is a part of a sentence that can stand on its own and can still technically be a valid sentence. A dependent clause depends on the main clause to form a complete sentence.
The root word of pithecanthropus is pithe, im almost positive. I hope this helps.