Options are not provided in the question. The complete question is as following:
A native species and a non-native species are competing for resources within the same ecosystem. The non-native species is more likely to survive than the native species in which of the following situations?
A. Both the native species and the non-native species thrive on the same food source.
B. The native species is immune to certain pathogens in the ecosystem.
C. Predators prey on both native and non-native species.
D. The non-native species has no natural enemies in the ecosystem.
Answer:
D. The non-native species has no natural enemies in the ecosystem.
Step-by-step explanation:
Non-native species which are introduced in new ecosystem are called invasive species and the native species is the species already living in that ecosystem.
The non-native species will be able to survive more than the native species, if non-native species or invasive species will have no natural enemies in the ecosystem. Here, natural enemies means the consumers feed over invasive species. If there will be no natural consumer for invasive species, it will lead to increase in invasive species population and will have higher chances to survive than native species.
Hence, the correct option is D.