Which of the following details provides a definition related to the topic, the purpose of zoos? A) US zoos are dedicated to ensuring the survival of all animals send Nash Finn, a research scientist at Memphis zoo.

B) an endangered species is a species of animal or plant that is seriously a risk of extinction.
C)animals saved by the US endangered species act include American alligator, bald eagle and grizzly bear.

C) animals saved by the US endangered species act include American alligator, bald eagle and grizzly bear.

The detail that provides a definition related to the topic, the purpose of zoos, is B) "an endangered species is a species of animal or plant that is seriously at risk of extinction." This detail helps to establish the importance of zoos in protecting and preserving endangered species.

The detail that provides a definition related to the topic, the purpose of zoos, is option B) "an endangered species is a species of animal or plant that is seriously at risk of extinction."

To determine this, you can analyze the options provided and look for information that directly relates to the purpose of zoos. In this case, option A talks about ensuring the survival of all animals, which could be a potential purpose of zoos. However, it does not provide a specific definition related to the topic. Option C mentions the animals saved by the US Endangered Species Act, but it does not directly define the purpose of zoos.

Option B, on the other hand, provides a clear definition of what an endangered species is. This definition is significant in relation to the purpose of zoos because one of the reasons zoos exist is to protect and preserve endangered species. Therefore, option B is the detail that provides a definition related to the topic, the purpose of zoos.