The answer is D The ureter connects the kidney to the urinary bladder
Anti- inflammatory combined with a local anesthetic that offers short term pain relief for degenerative disc disease. So a positive effect , in some cases saline can flush out chemicals that can cause the inflammation providing even more pain relief.
They are dangerous to the environment because they have no natural competition. That being said they have nothing to keep their population in check, therefore, taking away food, and habits from all the other species. Thus, causing species to die out, which in turn ruins the food chain.