4. what are naturalists most likely to do if another species is close to becoming extinct?

a. begin breeding them in captivity.
b. capture them, and release them in arizona.
c. breed them with a related species.
d. let nature take its course.

Naturalists are most likely to begin breeding them in captivity (A).

The rationale behind this decision, as stated in the text, is that "the loss of one species can affect a whole ecosystem." This is the reason why the naturalists in question took these measures in the case of the California condor, and their argument indicates that they would do it again for another species if it meant they would preserve the ecosystem.

By capturing some of the few leftover individuals of a species, you make it easier for the males and females to find themselves and produce offspring, which can grow up in safe conditions and later be released into the wild.

answer: the sentence in the text that contains both the topic and the author's single most important idea about the topic

explanation: aww pineapple so adorable

a term is used to describe a sudden revelation in a short story is "showing forth".