[I choose c.]
It is often difficult to save individual species because
a.small populations are more prone to disease
b.inbreeding may result in genetic disorders
c.captive species may not reproduce in the wild.
d.all the above.
I would say (d)
To determine the correct answer to this question, let's break down each option and see if it applies to the difficulty of saving individual species:
a. Small populations are more prone to disease: Small populations of species are at a higher risk of being affected by diseases because they have fewer individuals to maintain a diverse gene pool, making them more vulnerable to genetic disorders and illnesses. Therefore, this option is one of the reasons why it is difficult to save individual species.
b. Inbreeding may result in genetic disorders: Inbreeding, which occurs when closely related individuals reproduce, leads to a decrease in genetic diversity within a population. This reduced genetic variation can result in genetic disorders or health issues in offspring. Again, this option contributes to the challenge of saving individual species.
c. Captive species may not reproduce in the wild: When species are kept in captivity (e.g., zoos or breeding programs), there is a risk that they may not be able to adapt to their natural surroundings or successfully reproduce once released into the wild. This can hinder conservation efforts and make it difficult to save individual species.
Based on these explanations, it becomes clear that all of the above options (a, b, and c) are indeed valid reasons that make it challenging to save individual species. Therefore, the correct answer is (d) - all of the above.