Yes dogs have earlobes, check towards the entrance of the ear where the it connects to the head and there will be a small flap, very thin in that area.
in general, there could be two realistic answers to this.
The first as a joke ... none, dogs don't have feet they have paws.
The second answer forgiving the feet/paw issue and presuming you meant...
Aggression is a very strong word in the dog language. There are very few cases where a pooch shows any TRUE aggression. When they do however, it depends on the situation or place they are in or at....