Final answer:
Preserving more than one population of an endangered species at multiple locations increases the likelihood of their survival and genetic diversity.
Step-by-step explanation:
The advantage of preserving more than one population of an endangered species at more than one location is that it increases the likelihood of the species' survival. By having multiple populations in different locations, the species is protected from local threats such as disease outbreaks, habitat loss, or natural disasters. Additionally, preserving multiple populations helps to maintain genetic diversity, which is crucial for the species' adaptation and resilience to changing environments.