What advantages might an andean soccer team have over a team that lives and plays in the lowlands?

An Andean team lives at a higher altitude. So naturally they produce more EPO than a lower altitude team. EPO promotes RBC production in the bones, the more RBC's in the blood increases their oxygen carrying capacity - thus they'll hive a higher natural endurance. 

You have to think about how the hills look in the other land

The area they r in. this  the answer.