Read The Passage: When he was old enough, his father sent him to Thessaly, with an older boy, Patroclus, for his companion, to Chiron, the wisest of all the Centaurs. And with the other boy, Chiron taught him to ride (on his own back) and trained him in all the warrior skills of sword and spear and bow, and in making the music of the lyre, until the time came for him to return to his father's court.

—Black Ships Before Troy,
Rosemary Sutcliff

What is the most important information the reader learns about Achilles from this part of his backstory?
1. how Achilles was trained to be a warrior
2. that Achilles trained with an older boy
3. why Achilles learned to play the lyre
4. when Achilles spent time in Thessaly