Difference Between Humans and Animals, Part X

Conservative Wesley Smith claims it is our morality and what that means for our interaction with the rest of the natural world:

Humans, Smith argues, are the only moral creatures: they have innate moral worth and their well-being always takes precedence over the well-being of animals, who are amoral creatures. Humans do indeed have a moral obligation to promote animal welfare, but they are also entitled to use animals, particularly if the use of animals alleviates human suffering.

What's the difference between humans and animals? Perhaps it the fact that we are even asking that question gives us the right to use the animal kingdom for our benefit. My next question is, in value, how many animals make one human?

Here's part one, two, three, four, five, six, seven, eight, and nine of this series.