The easiest cause of aggresive dog behavior to remedy would be incompetent training (D).
Explanation:
If a dog was not trained properly, it can easily be trained the correct way. It may take a bit longer than it would have if the dog had been trained properly from the start, but it shouldn't be too complicated. This should help alleviate the dog's aggression if this is the case. If a dog had inadquate socialization or was abused, this causes them severe emotional trauma and can take a long time to heal from. This means there aggression will be harder to remedy.
Amino acids make up proteins, and proteins are needed for proper growth in humans. They’re essential because, without them we wouldn’t have the nutrients we need to survive. I hope this helped!
