Environments are covered with manmade structures like roads, buildings, and sewers. green spaces such as parks, backyards, and undeveloped lots are scattered in among the developed areas instead of all connected together. plants and animals have to deal with exposure to toxins from vehicles and loss of habitat and food sources. these are all ways that .
a. humans have intervened to both manage and manipulate the environment to ensure species survival
b. nonhuman life in an urban ecosystem differs from that in an undeveloped forest ecosystem
c. cities have been form to keep wildlife in public

Answer : Option B) Nonhuman life in an urban ecosystem differs from that in an undeveloped forest ecosystem.

Explanation : From the above information given, it can be simply concluded that humans have changed the environment around them. The human habitats are very different from the nonhuman life habitats. They have their own ecosystem designed for their comfort. This impacted the nonhuman life as they have different ecosystem in cities than in the forests.

"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."

idk why hjggjhjkhj