The barking of the dog is normally enough to scare away a predator, and also alerts any nearby humans to the threat.
(The barking of the dog; is; normally enough to scare away a predator) (The barking of the dog; also alerts; any nearby humans; to the threat)
The barking of the dog The barking of the dog
is also alerts
normally enough to scare away a predator
any nearby humans to the threat