Read the sentence.
If [the animals] could speak, they would plead for a better life. It is wrong not to give them one.
This passage represents what type of support?
It is evidence based on what the zookeepers have told the author about the animals.
It is evidence that is based on opinion after observation of the animals.
It is evidence because it is a fact that can be confirmed or proven.
It is evidence because the author is an expert on animal behavior.