Root Charger/Rulings

Q: I cast Root Charger. Then my Aqua Ranger loses a battle. Where does Aqua Ranger go?

A: You can put Aqua Ranger into either your hand or your mana zone. When Aqua Ranger would be put into your graveyard, Root Charger's ability and Aqua Ranger's ability both trigger. You can do only one of them, but since they're both your abilities, you choose which one to use.