What are nonnative species a threat to biodiversity? a) they often use up resources that the organisms need. b) they are not able to successfully breed in the wild. c) they release pollution into many environments. d) they easily contract and spread diseases to other organisms.

 Option A

Explanation:

Non native species can be defined as the the species that are intentionally or non intentionally being brought to a place where it did not belong. These species might come to a new place by certain carriers.

Non native species are threat to biodiversity means native species because the invasive species utilize the resources that is available for the native species.

The resources can be sunlight, food, and other resources which will lead to competition.

"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."

i dont know it at allnow im just getting points at this pint