The Relative Clause is “who are five in number”. It is a type of dependant clause (it need the main clause in order to convey its meaning properly) that has the same function of an adjective; that is to say, it modifies a noun “friends”.
A, the American Revolution
That is true. When there were famine and catastrophes in the Aztec empire, they realized that was due to the fact they didn't offer enough human sacrifices to their gods. Therefore, The Flower Wars were fought.
