Here's why:
* Tamed: Means an animal has been made less wild and more accustomed to humans.
* Domesticated: Means an animal has been bred over generations to be suitable for living with humans.
While a wild animal can be tamed, it doesn't mean it's truly domesticated. Domestication is a longer process that involves genetic changes.
For example, a wolf can be tamed and may even become friendly with its human companions. However, a wolf will never be considered truly domesticated because it's not a breed that's been selectively bred for generations to live alongside humans.