Roberto is conducting research about the ethics of confining animals in zoos. which source on his list is the most credible?

1)a site where people share stories about their experiences in zoos and their feelings about zoos
2) a research study published on a university’s website about how being in a zoo affects animals
3) an advertisement for a family vacation package that includes an amusement park and zoo
4) a blog where a zoo owner discusses everyday life working at a zoo and caring for animals

2) a research study published on a university’s website about how being in a zoo affects animals.

The most credible source on his list is option 2. With option 1, Roberto would only have access to subjective opinions, which are not a good source of evidence for research. Option 3 is an advertisement, which means that it does not contain a lot of information. It also means that it is likely to present zoos as a very desirable thing. Finally, option 4 is also likely to be subjective and biased, as the author is a zoo employee. On the other hand, option 2 comes from a research study published on a university's website, which means it is likely to be trustworthy.

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