An author claims that "zoos do more good than harm." The author provides the following as support for the claim:

Without zoos, there are 37 endangered species that would now be extinct. The white rhinoceros and the South China tiger are just two examples. They survive today because the last two of each species were carefully bred in captivity. If not for zoos, these species would have died in the wild.

Which choice best describes the support the author provides?

It is effective support for the claim.
It is ineffective support because it does not help prove the claim.
It is ineffective support because it presents opinion rather than fact.
It is ineffective support because it provides no source for the information.