SPOILERS:
ME1 says that they are in a form of hibernation until its time to attack again. They leave one behind to make make sure the Citadel beacon gets activated and do all the other things needed to ready the attack.
So I'd say hibernation since that is what the game told us.
ME1 says that they are in a form of hibernation until its time to attack again. They leave one behind to make make sure the Citadel beacon gets activated and do all the other things needed to ready the attack.
So I'd say hibernation since that is what the game told us.